In 1859, a meteorite streaks across the sky and crashes into the Gela Alta glacier in western Greenland, causing a massive explosion that kills an Inuk fisherman. In present-day Copenhagen, Smilla Jaspersen, a transplanted Greenlander, is studying ice crystals at a university lab. Although an Arctic ice specialist, Smilla has not completed her credentials and is unemployed, with a troubled past. When she returns to her apartment complex at the end of the day, she finds the body of six-year-old Isaiah Christiansen, a neighbor Inuk boy. He is lying in the snow by the edge of the building. The police say that he must have been playing and fallen from the roof. Smilla knew he was afraid of heights and, on the roof, sees that his footprints show he ran straight to the edge of the roof, as if threatened. At the morgue Smilla meets with Dr. Lagermann. She is surprised when he tells her that a prominent professor, Dr. Johannes Loyen, performed the autopsy on the boy, who was from a poor working-class family. When she consults with Loyen the next day, he declares the boy's death to be an accident. Unconvinced, Smilla files a complaint with the District Attorney. She goes to Lagermann's home seeking more information, and he says that he found a puncture wound on the boy's thigh, made by a biopsy needle after his death. He also says that Loyen was examining the boy every month. At the funeral, Smilla notices Dr. Andreas Tork, the CEO of Greenland Mining, offering money to Isaiah's mother, who rejects it angrily. Following her husband's accidental death in Greenland in mining, the company had offered her a pension. Detective Ravn from the District Attorney's office agrees to look into the case, but Smilla discovers he is involved with Tork. Smilla tracks down the company's former accountant, and gains access to a company report about activities in Greenland. A neighbor mechanic becomes involved and offers to help her. Detective Ravn threatens Smilla with jail for stealing Greenland Mining property. She agrees to suspend her investigation but, after learning from Isaiah's mother that her husband died from something in the mine's melt water, she continues. Smilla asks her father, Moritz Jaspersen, to help her in making sense of the Expedition Report; he agrees to look into it. At the apartment complex, Smilla searches around Isaiah's former hiding place by a stairwell, and discovers a cassette tape hidden behind the wall. Unable to understand the audio, she takes the tape to a blind audio expert, Licht. Shortly after he tells her that it is Isaiah's father talking to his son, Licht is murdered. Smilla barely escapes with her life and the mechanic picks her up. They follow their pursuers to a ship, which Tork is preparing for another Greenland expedition. Smilla's father shows her medical x-rays from the report, which reveal that a type of lethal, prehistoric "Arctic worm," long thought to be extinct, apparently was the cause of the "accidental" deaths of mine workers. When the worm entered individual's bodies and attacked organs, it caused toxic shock and death. Aided by others, Smilla gets aboard the mining ship as an employee. She meets Nils Jakkelsen, who helps her discover videotapes that reveal the mining company had discovered an energy-producing meteorite along with the parasitic worm. Tork believes the meteorite will give his company a dominant position in the industry. There is also a video tape of Prof. Loyen medically examining Isaiah. Smilla is chased throughout the ship by Tork's men, who kill Nils. Smilla is helped again by the mechanic, who tells her he has been working for the government to investigate the company. As the ship approaches shore, Smilla leaves and makes her way across the frozen landscape. She finds the entrance to the Greenland Mining ice cave, where the company is conducting research on the meteorite. Prof. Loyen is among those present. Tork explains that Isaiah's father was a diver who went into the water around the meteorite and contracted the parasitic worm. Isaiah was also potentially infected as well. Prof. Loyen then monitored Isaiah for a time to see if he was indeed infected. An armed confrontation takes place, but Smilla is rescued by the mechanic and another man. During a struggle, Prof. Loyen falls into the icy pool (containing said meteorite) in the cave, instantly freezing to death (as he sinks below the depths). Tork is wounded and runs out across the ice. Smilla pursues him and recounts what happened with Isaiah. Tork had followed the boy home in hopes of recovering the recording and in the resulting pursuit, Isaiah fled to the roof of his building and fell off the edge. From outside, the mechanic/agent sets off a powerful bomb that destroys the cave and buries all still inside. The resulting waves cause Tork to fall from the ice and drown in the freezing water. Smilla gazes over the landscape of ice and snow, the land of her childhood.

At a corporation's base on the Neptunian moon Triton, mercenaries are setting up a defense perimeter to try to hold off an unstoppable cyborg warrior. The company's CEO E.J. Saggs and chief scientist Dr. Nabel seal themselves inside the control room. The cyborg destroys the soldiers' tank and then attacks a helicopter, which crashes into the control room. The soldiers are killed one by one, until Nabel finally deactivates the cyborg with a remote control. The remaining corporate employees discover that the cyborg was created by Nabel for the company. Saggs takes the remote and reactivates the cyborg, ordering it to kill Nabel. Meanwhile, John Canyon, one of the last independent "space truckers", drops off his cargo of square pigs at a "truck stop" space station, but becomes embroiled in a brawl with the trucking company head, Keller, who is sucked out into space. He and his two passengers—Cindy, a waitress who has promised to marry him in exchange for a ride to Earth to see her mother, and Mike, an up-and-coming trucker working for the company—take on a deal to transport alleged sex dolls to Earth. Chased by police investigating Keller's death, John takes his rig into the "scum cluster", a region controlled by pirates. The rig takes damage, leaving them adrift; they are soon captured by the pirate ship Regalia, commanded by the company-hating Captain Macanudo. Cindy agrees to have sex with him if he would take the cargo and let them go. The captain is revealed to be Nabel, who rebuilt his grievously injured body and went into piracy as revenge against Saggs for betraying him. The cargo that John's rig is carrying is in fact a full supply of the cyborg warriors Nabel designed and built for Saggs' company. One of the cyborgs activates, kills most of the crew, and severely damages the ship. John, Cindy and Mike take their rig and escape as the Regalia explodes. As they make their way back to Earth, John and Mike find a mortally wounded Macanudo in the hold, who reveals the true nature of the cargo to them. John releases Cindy from any obligation of marrying him, and tells her and Mike to take the escape pod while he releases the cargo in the atmosphere, where it will burn up on re-entry. Cindy and Mike land safely, but the rig is unable to return to space and explodes in the sky; however, John is able to safely escape before the explosion. John, Cindy and Mike go to the hospital to see Cindy's mother, who became sick twenty years earlier and was frozen until a cure was found; John is smitten with her at first sight. Meanwhile, Saggs—now President of Earth after the government was privatized—visits John, Cindy and Mike in the hospital, where he offers John a new rig and gives the trio a suitcase full of money to keep them quiet about his cyborg invasion plan. John tactfully agrees to the deal, convinced they will all be assassinated if they don't accept, but Mike angrily throws the suitcase out the window. Below, Saggs re-enters his presidential limousine; having planted a bomb in the suitcase, he triggers the detonator just as the suitcase lands on his limousine's roof, killing him. With Saggs dead and Earth safe, but also having inadvertently blown up the president, Mike, Cindy, John and Cindy's mother quietly escape to the spaceport and blast off in their brand new rig.

Gregorio and Ingrid Cortez are spies with two children, Carmen and Juni, whom they shield from their lives to protect them from inherent danger. They work for the Organization of Super Spies (OSS) doing office consultant work, but are suddenly called back to active field work to find missing agents. Gregorio suspects children's television host Fegan Floop has kidnapped them, mutating them into his "Fooglies" – creatures on his show, a program that Juni avidly watches. The children are left in the care of their uncle, Felix Gumm. Gregorio and Ingrid are captured by Floop's "Thumb-Thumbs" (robots whose arms, legs, and heads resemble oversized thumbs) and taken to his castle. Felix is alerted to the parents' capture, activates the fail-safe, and tells the children the truth about their parents, and that he is not their uncle, but an agent sent to watch over them. The house is attacked by Ninja Thumb-Thumbs, and Felix is captured while the children escape alone via a miniature submarine set to autopilot to a safe house. At the safe house, the children accept that their parents were spies and decide to rescue them. Inside Floop's castle, he introduces his latest creation, small child-shaped robots, to Mr. Lisp. They plan to replace the world leaders' children with these super-strong robots to control the world, but since the androids have no artificial intelligence yet, they are unable to function outside their regular programming. Lisp is furious, demanding usable androids. Floop, with his second-in-command Alexander Minion, interrogates Gregorio and Ingrid about 'The Third Brain'. Ingrid knows nothing of it, while Gregorio claims he had destroyed the brain years ago. After Floop leaves, Gregorio reveals to Ingrid that the Third Brain was a secret OSS project he had worked on: an AI brain with all the skills of the entire OSS. The project was scrapped for being too dangerous, and many scientists demolished the brains that they were working on, but Gregorio refused to destroy the final prototype. At the safe house, Carmen and Juni are visited by OSS agent Ms. Gradenko. Giving Carmen a bracelet as a sign of trust, she asks about the Third Brain, but Carmen is confused. Gradenko orders the house to be dismantled, and the siblings realize Gradenko is a traitor when they see ninja Thumb-Thumbs destroying the escape submarine. With Gradenko's intentions revealed, Juni accidentally exposes the Third Brain, and a chase ensues. Carmen gets the brain, and she and Juni escape. She realizes too late that the bracelet from Gradenko has a tracking device, and she and Juni are attacked by their robot counterparts, who steal the Third Brain and fly away. Meanwhile, back at the castle, Gregorio tells Ingrid that Minion used to work for the OSS, but was fired after he reported him tampering with the Third Brain project. With it, Floop can achieve his goal, but he wishes to continue his children's TV show. Minion has different plans and takes over, locking Floop inside his "virtual room", the chamber where he films his television series. Carmen and Juni receive reluctant help from Gregorio's estranged brother Isador "Machete" Cortez when they show up at his spy shop. He refuses to accompany them, so they steal some gear and take his spy jet to fly to Floop's castle. After a few mishaps, Carmen and Juni eject themselves from the plane before it crashes into the castle, and they enter via the underwater entrance. While the children infiltrate the castle, Juni rescues Floop, who helps him and Carmen release their parents. Together, they trap Minion in Floop's Fooglies machine, mutating him into a Fooglie. Confronting Lisp and Gradenko, the family is beset by all 500 robot children. Suddenly, Machete busts through the window, reconciling with Gregorio and joining the family to fight. However, at the last moment, Floop reprograms the robots to change sides. The 500 superhuman robots quickly overpower Minion, Lisp, and Gradenko. With advice from Juni, Floop introduces the robot versions of Carmen and Juni on his show. At home, some time later, the family's breakfast is interrupted by Devlin, the head of the OSS, with a mission for Carmen and Juni. The children tell him they will only accept if all the Cortezes can work on the mission together as a family.

Ten-year-old Chihiro Ogino and her parents Akio and Yūko travel to their new home. Akio, driving down an unexpected road, ends up in front of a tunnel leading to what appears to be an abandoned resort town, which her parents insist on exploring over Chihiro's protests. Upon finding a seemingly empty restaurant stocked with food, Chihiro's parents immediately begin to eat. While exploring further, Chihiro finds an enormous bathhouse and meets a boy named Haku, who warns her to return across the riverbed before sunset. However, spirits begin to appear, and Chihiro discovers that her parents have been transformed into pigs and that she cannot cross the now-flooded river. Haku finds Chihiro and instructs her to ask for a job from the bathhouse's boiler-man, Kamaji, a yōkai spirit commanding soot sprites known as susuwatari. Kamaji instead asks a worker named Lin to bring Chihiro to Kamaji's master Yubaba, the witch who runs the bathhouse and who cursed Chihiro's parents. Yubaba tries to frighten Chihiro away but eventually gives her a work contract. As Chihiro signs the contract with her name (千尋), Yubaba takes away the second kanji in her name, renaming her Sen (千). She soon forgets her real name, and Haku later explains that Yubaba controls people by taking their names; if Chihiro completely forgets hers like he once did, she will never be able to leave the spirit world. The other workers, except for Kamaji and Lin, frequently mock Sen. While working, she invites a silent creature named No-Face inside, believing him to be a customer. The spirit of a polluted river arrives as Sen's first customer. After she cleans him, he gives her a magic emetic dumpling as a token of gratitude. Meanwhile, No-Face demands food from the bathhouse workers, granting gold copied from the river spirit in exchange. However, when Sen declines the gold and leaves to find Haku, No-Face angrily swallows some workers. Sen sees paper shikigami spirits attacking a dragon and recognizes the dragon as a metamorphosed Haku. When the seriously injured Haku crashes into Yubaba's penthouse, Sen follows him upstairs. A shikigami that stowed away on her back shapeshifts into Yubaba's twin sister Zeniba, who turns Yubaba's son, Boh, into a mouse and creates a false copy of him. Zeniba tells Sen that Haku has stolen a magic golden seal from her that carries a deadly curse. Haku strikes the shikigami, causing Zeniba to vanish. Sen and Haku fall into the boiler room, where she feeds him part of the emetic dumpling. He vomits up the seal and a slug that a disgusted Sen kills. Sen resolves to return the seal and apologize to Zeniba. She confronts an engorged No-Face and feeds him the rest of the dumpling, forcing him to regurgitate the workers. No-Face follows Sen out of the bathhouse, and Lin helps them leave. Sen, No-Face, and Boh travel to see Zeniba using train tickets from Kamaji. Meanwhile, Yubaba nearly orders Sen's parents slaughtered, but Haku reveals Boh is missing and offers to retrieve him if Yubaba releases Sen and her parents. Yubaba agrees, but only if Sen can pass a final test. The train crosses a sea to a land where Sen meets Zeniba, who reveals that Yubaba used the slug to control Haku. Zeniba tells Sen that she cannot help her parents, but she makes her a magic protective hairband. Using his dragon form, Haku flies Sen and Boh back, while No-Face decides to stay with Zeniba. Mid-flight, Sen recalls falling into the Kohaku River years earlier and being washed safely ashore, correctly guessing Haku's real identity as the spirit of the Kohaku River and restoring his memory. When they arrive at the bathhouse, Yubaba tests Sen, asking her to identify her parents among a group of pigs. After she answers correctly that none of the pigs are her parents, her contract disappears and she is given back her real name. Haku takes her to the now-dry riverbed and vows to meet her again. Chihiro crosses the riverbed to her restored parents. Shortly before leaving for her new home, Chihiro looks back at the tunnel, still wearing her hairband from Zeniba.

Nashawn Wade claims that he has loved planes since he was a child, but he has a horrible experience with a typical airline: his dog Dre is classified as checked baggage instead of a carry-on, he eats a horrible airline meal, his buttocks get stuck in the toilet while he has diarrhea, caused by his meal, during turbulence, and Dre is fatally sucked through a jet engine after a flight attendant accidentally opens the cargo door. In response to the terrible experience he endured, Nashawn sues the airline and is awarded $100,000,000 by the jury. He decides to use the money to start his own airline, called N.W.A. (Nashawn Wade Airlines), whose acronym and logo are a pop culture reference to rap group N.W.A. The airline specifically caters to African Americans and hip hop culture. The terminal at the airport is called the Malcolm X terminal, where two non-working TSA Agents, Jamiqua and Shaniece, are goofing off instead of checking belongings. The plane is a heavily modified Boeing 747SP, customized with low-rider hydraulics, spinners, and a dance club. The safety video is also a parody of the Destiny's Child song " Survivor ". After taking off from Los Angeles International Airport, Nashawn must deal with a multitude of problems, starting with his acrophobic captain, Captain Mack. At a cruising altitude of Flight Level 330, it is revealed that he has never left the ground because he learned to fly on computer simulators in prison. Meanwhile, his cousin Muggsey sets up a miniature casino and strip joint in one of the areas of the plane (as seen in the workprint and unrated versions of the film), and Nashawn's ex-girlfriend, Giselle is on board and less than happy to see him. Meanwhile, the Hunkee family, the only Caucasian passengers on board, must also deal with their own problems; Elvis' daughter Heather is turning 18 and plans to use her newfound freedom by drinking and having sex, his son has transformed from an exact duplicate of him to a stereotypical wigger, and his wife is suddenly addicted to black men after viewing pictures in a pornographic magazine. Captain Mack seemingly dies after eating mushrooms that the co-pilot, First Officer Gaemon, uses to soothe his genital crabs. Nashawn attempts to contact Gaemon, who is incapacitated after slipping near a hot tub, forcing Nashawn to attempt to land the plane himself. Nashawn lands the plane safely, using flight attendant Blanca's flight knowledge which she learned while having sex in the cockpit with the pilot on another plane. The plane lands in the middle of Central Park instead of John F. Kennedy International Airport in Queens, New York, and the spinners are stolen from the plane. Nashawn reconciles with Giselle after earlier revealing to her that he only broke up with her so she would not give up her college opportunities for him. The movie ends with Nashawn telling the audience the fate of his crew. He claims that he and his ex-girlfriend are back together and are taking their relationship slow this time around, his cousin Muggsey has started a strip club and gambling casino located in another airplane similar to the club in Nashawn's plane, Elvis has begun a sexual relationship with Jamiqua, and his son Billy has become a major music video director but has disappeared shortly after filming a Michael Jackson video. Captain Mack later wakes up to find his chain and clothing stolen.

On July 4, 2005, El Paso and Abilene, Texas are destroyed and hundreds of thousands are killed by twin nuclear attacks, sending the United States into a state of a Third World War, with the government re-introducing the draft. The PATRIOT Act extends authority, due to the overwhelming victory of the Republican Party, to US-IDENT, a new agency which keeps constant surveillance on citizens. In response to the recent fuel shortage in the wake of global warfare, the German company Treer designs "Fluid Karma", a generator of inexhaustible energy, which is propelled by the perpetual motion of ocean currents. Treer scientist Baron Von Westphalen seeks world domination using the leverage of his energy machine. In 2008 Los Angeles, Senator and GOP Vice-Presidential candidate Bobby Frost (who also seeks the presidency itself) presides over the opening of US-IDENT with his wife, Nana Mae Frost, installed as its director. Right-wing film star Boxer Santaros awakens on the beach with amnesia after a three-day disappearance. He does not remember his marriage to Senator Frost's daughter Madeline, and has instead begun an affair with former porn star turned-talk show host Krysta Now. Meanwhile, a group of Neo-Marxist revolutionaries composed of Cyndi Pinziki, Zora Carmichaels and Ronald Taverner hatch a plan to turn the national spotlight against US-IDENT. They have kidnapped Ronald's twin brother, police officer Roland, and plan to outfit Ronald in his uniform and car in order to stage a racially motivated double-murder. They have Boxer bring a video camera as he goes with Ronald, under the guise of preparing for a police officer role for his screenplay. Ronald responds to a staged domestic disturbance call where Neo-Marxists Dream and Dion, disguised as newlyweds, fake an argument. Unexpectedly, another cop, Bart Bookman arrives on the scene, murders Dream and Dion, and takes the camera. Bookman is revealed to be in cahoots with Zora when she later attacks Ronald with fluid karma, leaving him unconscious in the street. The next day, Krysta stops by Zora's apartment and takes the videotape of the double murder, mistaking it for her sex tape. At the Santa Monica beach, she puts it in a Neo-Marxist dropbox, leading to the contents later being made public, and Zora and Bookman are shot dead by police while attempting to steal back the tape. Boxer arrives at the beach and meets Starla, who called him earlier posing as a character from his screenplay, and threatens to kill herself if he does not allow her to perform oral sex on him. Iraq War veteran Private Pilot Abilene shoots her dead from his perch at the top of the pier and Boxer runs off, only to be confronted by supposed friend Fortunio, who knocks him unconscious and returns him to the Frosts. Nearby, Ronald awakens and sets out to find his brother. He encounters a young man named Martin Kefauver in an SUV and stops him from killing himself to avoid the draft, and the two go out in search for Roland, who earlier escaped the Neo-Marxist headquarters during a US-IDENT raid, only to be captured by Walter Mung, an ice cream truck-based arms dealer. The Frosts and the city prepare for an upper-class party on Von Westphalen's Mega- Zeppelin to celebrate its launch. Boxer leaves the main hall of the ship in search of answers, and finds a room with three of Westphalen's scientists, who explain that he was selected to travel through a time rift in the desert at the time of his disappearance, and is, in fact, his future self. The scientists show him the corpse of his past self, who they say killed himself. Boxer asserts that his suicide is impossible because he is a "pimp", and "pimps don't commit suicide." One of the scientists also states that dire consequences would unfold if two identical human souls were to make physical contact. Boxer presses Serpentine for details, revealing that Boxer was actually murdered in a car bomb and that Roland was the one who kidnapped Boxer and drove him through the rift. She also confirms that Roland and Ronald are the same person, with his past and present self coexisting. Outside where the city is, as a firefight ensues between rioters and the police, both Taverners crash into each other. Roland is shot in the eye but survives. Inside the ice cream truck, the Taverners hold hands, causing the truck to rise into the air along with Kefauver, who stands on top with a shoulder-mounted heat-seeking ground-to-air missile. US-IDENT headquarters is raided by Fortunio and rioters who kill Nana Mae Frost. Inside the Zeppelin, Boxer returns to the main hall and takes the stage for a dance number involving Krysta and his wife, Madeline. He interrupts the number to order an evacuation, or else he will kill himself. Kefauver fires a rocket at the Zeppelin, destroying it, and jumps off the truck. As the Taverners continue to hold hands, a time rift begins to grow in the sky. Roland threatens Ronald with suicide if he does not let go and tells him to "remember Fallujah". Ronald replies that it was not their fault, with Roland conceding that it was friendly fire. Abilene narrates that a new age is beginning, with Roland as its Messiah, concluding that he is a "pimp" and that "pimps don't commit suicide."

In wartime Munich in February 1943, Sophie Scholl joins her brother Hans in the White Rose student organization. They have prepared an anti-government leaflet and have more copies than they can distribute by mail. Hans proposes distributing the extras at the Ludwig-Maximilians-Universität München and Sophie volunteers to assist. Hans and Sophie put stacks of leaflets near the lecture rooms while classes are in session. When Sophie pushes a stack of leaflets over a balustrade she is spotted by Jakob Schmid, a janitor, and the pair are detained for the Gestapo. They are taken to the Wittelsbacher Palais headquarters where Sophie is interrogated by Gestapo investigator Robert Mohr. She denies that she and her brother had left the leaflets and claims to have pushed the stack off the railing as a prank. She explains the empty suitcase in her possession was for bringing back clothes from a visit to her parents in Ulm. She is remanded when the Gestapo announce they have incontrovertible evidence that Sophie and Hans were responsible for the distribution of the leaflets. She is placed in a cell with dissident Else Gebel, a Communist sympathizer. Sophie confesses her part, contradicting her brother's claim he acted alone. Determined to protect the others, she steadfastly maintains that the distribution of thousands of leaflets throughout the region was the work of the siblings. Mohr, having learned that their father was an imprisoned dissident, urges her to support laws that preserve a society which has funded her welfare and education. Scholl counters that before 1933 the laws protected freedom of speech and denounces atrocities committed by the Nazis. Mohr dismisses some of her accusations, such as the extermination of the Jews, as wartime propaganda, but acknowledges others like the euthanasia program. Sophie and Hans, as well as a friend with three young children, Christoph Probst, are charged with treason, troop demoralization and aiding the enemy. Four days after their arrest they are put on a show trial. Probst is examined first by President of the People's Court Roland Freisler, whose zeal makes the prosecutor and defense attorneys superfluous. Freisler contemptuously dismisses Probst's appeals to spare his life so that his children can have a father. Hans maintains his composure in the face of Freisler's impatient questioning. Declining to answer only what he is asked, he denounces German war crimes on the Eastern Front as immoral and proclaims that the defeat of the Nazi state by the Allies is all but certain. Sophie denies she was led by her brother, and declares that many people are scared to admit they agree with her group. Freisler pronounces the defendants guilty and calls on each to make a final statement. Sophie warns that "where we stand today, you will stand soon." All three are sentenced to death and transported to Stadelheim Prison. Sophie, assuming a normal 99-day delay between conviction and execution, learns she is to be executed the same day. She breaks down briefly, but regains composure, writes a final statement and receives a blessing from the prison chaplain, who offers his support for her silence. After a visit by her parents, who also express approval of what she has done, Mohr arrives and sadly watches Sophie taken away. She is led into a cell with Christoph and Hans, and they share a final cigarette. Sophie is led into a courtyard and remarks "The sun is still shining". An appeal for clemency is declined by the Reich Ministry of Justice, and she is beheaded by guillotine. Hans screams "Let freedom live!" before the blade goes down, and Christoph is executed last. A caption lists dozens of adherents of the White Rose executed in the following months, while others suffered imprisonment. In the final shot, thousands of leaflets fall from the sky over Munich. A narration explains that the sixth leaflet of the White Rose were smuggled through Scandinavia to the United Kingdom by Helmuth James Graf von Moltke, where the Allies then printed millions of copies of the "Manifesto of the Students of Munich" to drop over Germany.

Speed Racer is a young man passionate about automobile racing. His parents, Pops and Mom, run Racer Motors, which involves his brother Spritle, their pet chimpanzee Chim Chim, mechanic Sparky, and his girlfriend Trixie. He also idolizes his late older brother Rex, who was killed racing in the Casa Cristo 5000, a deadly cross-country rally. Now starting his own career, Speed is rapidly gaining fame with his brother's Mach 5 and his own T-180 car, the Mach 6, while focusing on racing and family. One day, E.P. Arnold Royalton, CEO of Royalton Industries, offers Speed a luxurious lifestyle in exchange for racing with him; Speed declines due to his father's distrust of corporations. Angered, Royalton reveals that key races have been fixed by corporate interests, including himself. As a show of power, Royalton has one of his drivers crash Speed's Mach 6 during a race, and also has Racer Motors sued for intellectual property infringement. Speed can retaliate through Inspector Detector, head of a corporate crimes division, since fellow racer Taejo Togokahn has evidence to indict Royalton but will only share it if Speed and the masked Racer X race for his team in the forthcoming Casa Cristo 5000, which could raise his family's racing business stock and block a Royalton buyout. Speed accepts but keeps it secret from his family, and Detector's team makes defensive modifications to the Mach 5 for the race. After driving together and working as a team, Speed begins to suspect that Racer X is Rex in disguise. His family discovers that he has entered the race and agrees to support him. With Trixie and his family aiding him, Speed defeats many brutal racers bribed by fixer Cruncher Block and overcomes obstacles to win the race, while Detector's team arrests Block. However, Taejo's plan is revealed to be a sham, as his true intention was to boost his family's company to secure a higher price for Royalton's buyout. Enraged by this news, Speed confronts Racer X, suspecting he is Rex. Racer X removes his mask, revealing an unfamiliar face and stating that Rex is dead, but advises Speed to stay true to himself and find his own reason to race. Speed returns home, planning to leave, but Pops expresses pride in him and admits his own stubbornness drove Rex away. Taejo's sister Horuko unexpectedly arrives with Taejo's rejected invitation to the Grand Prix. The Racer family unites and builds a new Mach 6 in 32 hours. Speed enters the Grand Prix with Inspector Detector against great odds; Royalton has placed a $1,000,000 bounty on him, and he faces future Hall of Famer, five-time WRL champion, and two-time Grand Prix champion Jack "Cannonball" Taylor. Speed overcomes a slow start to catch up with Taylor, who cheats using a spear hook to tie the Mach 6 to his car. Speed reveals it to the cameras, exposing Royalton's crimes, causing Taylor to crash and lose, and eventually winning the race. As Racer X watches from afar, a flashback montage reveals him to be Rex, having faked his death, secretly attended his funeral, and undergone facial plastic surgery to protect Speed. He chooses not to reveal his identity to his family, opting to live with the consequences of his choice. The Racer family celebrates Speed's victory, and Taejo testifies against Royalton and his henchmen, causing Royalton to be imprisoned for his crimes.

U.S. Army pilot Captain Colter Stevens wakes up on a Metra commuter train going into Chicago. He is disoriented, as his last memory was of flying a mission in Afghanistan. However, to the world around him – including his friend Christina Warren and his reflection in the train's windows and mirrors – he appears to be a different man: a school teacher named Sean Fentress. As he expresses his confusion to Christina, the train explodes while passing another train, killing everyone aboard. Stevens abruptly awakens in a dimly lit cockpit. Communicating through a video screen, Air Force Captain Colleen Goodwin verifies Stevens' identity and tells him of his mission to find the train bomber before sending him back to the moment he awoke on the train. Believing he is being tested in a simulation, Stevens finds the bomb in a vent inside the lavatory but is unable to identify the bomber. Still thinking he is in a simulation, Stevens leaves the bomb and goes back down to the main cabin before the train explodes again. Stevens again reawakens in his capsule and after demanding to be briefed, learns that the train explosion actually happened and that it was merely the first attack of a suspected series. He is sent back yet again, eight minutes before the explosion, to identify the bomber. This time, he disembarks from the train (with Christina) to follow a suspect. This turns out to be a dead end, the train still explodes in the distance, and Stevens is killed by a passing train after falling onto the tracks while interrogating the suspect. The capsule power supply malfunctions as Stevens reawakens. He claims to have saved Christina, but Dr. Rutledge, head of the project, tells him that she was saved only inside the "Source Code". Rutledge explains that the Source Code is an experimental machine that reconstructs the past using the dead passengers' residual collective memories of eight minutes before their deaths. Therefore, the only thing that matters is finding the bomber to prevent the upcoming second attack in Chicago. On the next run, Stevens learns that he was reported as killed in action two months earlier. He confronts Goodwin, who reveals that he is missing most of his body, is on life support, and is hooked up to neural sensors. The capsule and his healthy body are "manifestations" made by his mind to make sense of the environment. Stevens is angry at this forced imprisonment. Rutledge offers to terminate him after the mission, and Stevens eventually accepts. After numerous attempts, including being arrested by train security for trying to obtain a weapon, Stevens identifies the bomber through a fallen wallet as the nihilistic domestic terrorist Derek Frost. He memorizes Frost's license and vehicle registration plates, and discovers a dirty bomb built inside a van owned by Frost; Christina follows him, and Frost shoots both of them dead. Outside the Source Code, Stevens relays his knowledge to Goodwin, which helps the police arrest Frost and prevents the second attack. He is congratulated for completing his mission. Rutledge secretly reneges on his deal to let Stevens die, as he is still the only candidate able to enter the Source Code. Being more sympathetic to his plight, Goodwin sends Stevens back one last time and promises to disconnect his life support after eight minutes. This time, he sets a date with Christina, defuses the bomb, apprehends Frost, and reports him to the police. He calls his father under the guise of a fellow soldier and reconciles with him, and sends Goodwin an email. After eight minutes, Goodwin terminates Stevens's life support. As the world around him continues to progress beyond eight minutes, Stevens confirms his suspicion that the Source Code is not merely a simulation, but rather a machine that allows the creation of alternate timelines. He and Christina leave the train and go on a date. In the same (alternate) reality, Goodwin receives Stevens's message. He tells her of the Source Code's true capability and asks her to help the alternate-reality version of him.

In 1983, two Russian cosmonauts hear something moving outside their spaceship. The ship then crashes in Kazakhstan. The sole survivor is Konstantin Veshnyakov. The military takes Veshnyakov to a military research facility run by Colonel Semiradov. Veshnyakov cannot remember the crash. The facility's scientist, Yan Rigel, tries and fails to cure the amnesia. Semiradov decides to recruit a controversial psychiatrist named Dr. Tatyana Yuryevna Klimova. Klimova quickly discerns that Veshnyakov shows symptoms of post-traumatic stress. Semiradov shows Klimova that at night, an alien emerges from Veshnyakov's mouth as he sleeps. Semiradov explains the creature emerges every night without Veshnyakov's knowledge, and that it is responsible for Veshnyakov's survival. The facility tried to extract the alien, but it is now symbiotically bonded to Veshnyakov and both will slowly die if separated. Klimova agrees to investigate how to separate Veshnyakov from the alien permanently – much to Rigel's jealous chagrin. Klimova decides she must test how Veshnyakov's hormones react to stress. She provokes him with accusations of abandoning his son and causing his colleague's death. Afterwards, Klimova asks for Veshnyakov to stay in a normal room during daylight hours instead of a cell, to see how he reacts to normal civilian life. She apologizes to Veshnyakov for her harsh words, and he tells her that he only found out about his son one week before his space mission. He had planned to meet his son after going home, but is now stuck in the facility. At night, Klimova interacts with the emerged alien from behind protective glass. She notices it fixate on a toy that belongs to Veshnyakov, and daringly removes the glass so she can give the toy to the alien. The creature ignores Klimova and plays with the toy. But when Klimova tries to touch the creature, it attacks her. Soldiers extract Klimova and contain the creature. Klimova theorizes the alien has merged with Veshnyakov, and it took interest in the toy because it reminds Veshnyakov of his son. She requests to take Veshnyakov to Moscow for treatment. Semiradov reveals this is impossible. His superiors in Moscow want to terminate Veshnyakov, and Semiradov has been lying about their research progress to keep Veshnyakov alive. While reviewing surveillance footage of the alien, Klimova realizes it is edited. She confronts Rigel, and he takes her to see Semiradov feeding live humans to the alien at night. Rigel reveals that the creature needs cortisol from a living, terrified human to keep itself and Veshnyakov alive. Disgusted, Klimova asks Veshnyakov to meet in secret. Veshnyakov incapacitates his guards, and Klimova shows him the bodies of the alien's victims. She explains the alien chose Veshnyakov as its host because his co-pilot had Addison's disease. Veshnyakov reveals he can remember everything the creature experiences, but has been hiding it because he wants the Moscow authorities to approve his release. Klimova is horrified that Veshnyakov could accept sacrificing human lives, but Veshnyakov explains that he will do anything to return to his son and his mother. Semiradov summons Klimova and reveals he knows she spied on the feeding. He defends his actions by explaining the alien is a powerful weapon the Soviets need to maintain peace, and that he only feeds it prisoners who have committed monstrous crimes. Semiradov allows Klimova to watch another feeding. However, Klimova requests to enter the feeding area and sings Veshnyakov's favourite song to the alien. At first, the creature softens and backs away. But when the prisoner tries to run, the creature kills him anyways. Klimova decides she must stop the experiment and help Veshnyakov escape. She convinces Rigel to help her. Then she convinces Veshnyakov that Semiradov will never let him leave. She plans to inject Veshnyakov with hormones that simulate Addison's disease, tricking the alien into rejecting Veshnyakov and permanently separating them. Rigel gives Klimova and Veshnyakov a set of car keys, and then confesses everything to the Moscow authorities by telephone just before Semiradov murders him. Semiradov's soldiers intercept Klimova and Veshnyakov. Cornered, Veshnyakov injects himself with the hormones prematurely, forcing the alien to emerge and attack the soldiers. The resulting chaos allows Klimova to drag Veshnyakov into the car and drive off. But Veshnyakov begins dying, and Klimova realizes he still needs the alien to live. Klimova allows Semiradov to catch up, knowing he will bring the injured alien to Veshnyakov. But before he can, Veshnyakov takes voluntary control of the alien and uses it to kill Semiradov and his men. Klimova spots trucks coming from Moscow thanks to Rigel. However, Veshnyakov decides he must die with the creature to avoid more killing, and shoots himself in the head. Klimova survives and adopts Veshnyakov's son.

True crime writer Ellison Oswalt experienced success due to his debut book presenting new evidence that led to the perpetrator's capture. Following the failure of his subsequent works, he moves to Chatsford, Pennsylvania with his family. Unbeknownst to Ellison's wife Tracy and their children, 12-year-old Trevor and 7-year-old Ashley, the previous homeowners, the Stevenson family, were murdered by hanging. Hoping to revitalize his career, Ellison intends to research the Stevensons' murders and the subsequent disappearance of their youngest child, 10-year-old Stephanie. In the attic, Ellison finds a box containing a scorpion, a projector, and film reels labeled as home movies. The footage displays families being murdered in various ways, seemingly by the camera operator. Ellison contemplates giving the videos to the police, but, excited at what they could contribute to his career, ultimately decides to keep and study them. Ellison notices a mysterious cultic symbol and a strange figure in the films. He matches one reel to the 1998 murder of the Miller family in St. Louis and the disappearance of their 13-year-old son Christopher. While investigating noises in the attic one night, Ellison finds a king snake inside the film reels' canister lid and childlike doodles of the killings, featuring a figure called "Mr. Boogie." After he falls through the ceiling, emergency services are called, including a deputy who enthusiastically agrees to help Ellison, jokingly accepting the nickname "Deputy So-and-So." Ellison later encounters a Rottweiler in the garden, which flees. Consulting the deputy, Ellison learns that the murders took place in different cities at different times, beginning in 1966, after which a child from each family disappeared. Before moving to Chatford, the Stevensons lived in the Millers' former house. Ellison consults occult specialist Professor Jonas about the symbol in the films, which Jonas links to pagan Babylonian god Bughuul, who is said to lure children into his realm and consume their souls. Jonas suspects the murders are part of a cult initiation rite rather than the work of a single murderer. Ghost children invisible to Ellison begin to haunt the house. Trevor begins experiencing night terrors, and Ashley paints Stephanie on the walls, claiming that Stephanie has been talking to her; Tracy is furious that Ellison moved them into the site of a crime without her knowledge. One night, Ellison finds the missing children in the attic, watching one of the films. Bughuul appears onscreen before physically appearing before Ellison. Ellison destroys the camera, projector, and reels, and moves the family back to their old home. Jonas sends Ellison images associated with Bughuul, including the mysterious symbol and a scorpion, snake, and dog. Early Christians believed that images of Bughuul created a gateway for him to enter the mortal world and possess children who see these images. Ellison finds the projector and reels, undamaged, in his attic, along with a new reel labeled "Extended Cut Endings". The deputy informs Ellison that he has determined the pattern – after a family is murdered, the next family to move in becomes the next victims, but are only killed after fleeing; the hauntings provide incentive. Ellison realizes that by moving again, he has placed himself and his family in danger. The "Extended Cut" depicts the missing children entering the frame following each murder, revealing them as the perpetrators of the killings under the influence of Bughuul – "Mr. Boogie." Feeling lightheaded, Ellison notices green residue in his coffee mug and finds a note from Ashley reading "good night, daddy" before losing consciousness. He awakens to find himself, Tracy, and Trevor bound and gagged. The possessed Ashley approaches with the camera and proclaims she will make Ellison "famous again" before dismembering them with an axe, then using their blood to paint pictures and Bughuul's symbol on the walls. She doodles their corpses on the lid of the film reel box as footage of her murders plays on the projector. Bughuul appears, claims Ashley, and walks into the film with her, presumably consuming her soul. Ashley's reel joins the box of films in the Oswalt family's attic, titled "House Painting '12." In a final jump scare, Bughuul's face suddenly appears onscreen.

In 1984, the Apple Macintosh 128K 's voice demo fails less than an hour before its unveiling at Flint Center. Apple co-founder Steve Jobs demands engineer Andy Hertzfeld to fix it, threatening to publicly implicate him in the presentation's credits if he does not. Hertzfeld finally suggests faking the demo by using the prototype Macintosh 512K computer. Jobs rants to marketing executive Joanna Hoffman about a Time magazine article exposing his paternity dispute with ex-girlfriend Chrisann Brennan as he denies he is the father of Brennan's five-year-old daughter, Lisa. Brennan arrives with Lisa to confront him – she is bitter over his denials and refusal to support her despite his wealth. Jobs bonds with Lisa over her MacPaint art and agrees to provide more money and a house. Apple co-founder Steve Wozniak asks Jobs to acknowledge the Apple II team in his presentation, but Jobs feels that mentioning the computer (which he considers obsolete) is unwise. By 1988, following the Macintosh's apparent failure, Jobs has founded a new company, NeXT. Before the NeXT Computer launch at the War Memorial Opera House, he spends time with 9-year-old Lisa. However, his relationship with Brennan is still strained. He accuses her of irresponsible behavior and using Lisa to get money from him. Wozniak arrives and predicts the NeXT will be another failure. Jobs confronts him about his public criticism of him, and Wozniak questions Jobs' contributions to computing history. Jobs defends his role as that of a conductor who directs "musicians" like Wozniak. Apple CEO John Sculley demands to know why the world believes he fired Jobs – Jobs was actually forced out by the Apple board, who were resolute on updating the Apple II following the Macintosh's lackluster sales. Despite Sculley's warnings, Jobs criticized the decision and dared them to cast a final vote on his tenure. After Hoffman and Jobs discuss NeXT's unclear direction, she realizes Jobs designed the computer to entice Apple to buy the company and reinstate him. By 1998, Apple has fired Sculley, purchased NeXT, and named Jobs CEO, and Jobs is about to unveil the iMac at Davies Symphony Hall. He is delighted by Hoffman's strong commercial forecasts but furious that Lisa has allowed her mother to sell the house Jobs bought for them. Hoffman reminds Jobs that he threatened to withhold Lisa's college tuition, and Hertzfeld admits that he paid Lisa's tuition and suggested she attend therapy. Wozniak again asks Jobs to credit the Apple II team during the presentation, and again, he refuses in an argument. Sculley arrives in secret, and the two make amends. Jobs and Sculley discuss Jobs' life as an adopted child, and Jobs admits that his need for control stems from his feelings of powerlessness in being given up. At the behest of Hoffman, Jobs apologizes to Lisa for his mistakes and accepts that he is her father, admitting he is "poorly made." He confesses to Lisa that " the Lisa " was named after her. On seeing her Walkman, he also promises Lisa that he will put more music in her pocket. Lisa watches her father take the stage to introduce the first iMac, but only after he hands her the printout of the abstract she made as a kid on the original Macintosh, which he kept with him all those years.