John Murdoch awakens in a hotel bathtub with amnesia. He receives a phone call from Dr. Daniel Schreber, who urges him to flee the hotel to evade a group of men who are after him. In the room, Murdoch discovers the corpse of a ritualistically murdered woman and a bloody knife. He flees the scene, just as a group of pale men in trenchcoats ("the Strangers") arrive. Police Inspector Frank Bumstead, who is investigating murdered prostitutes, identifies Murdoch as a suspect. Following clues, Murdoch learns his name and finds out he has a wife named Emma. When the Strangers corner him, Murdoch instinctively alters reality (an ability the Strangers share and refer to as tuning) to create an escape path for himself. Murdoch wanders the streets of the city where it is perpetually nighttime but no one seems to notice. When the clock strikes twelve, Murdoch witnesses everyone else fall asleep and the Strangers use tuning to physically rearrange the city's architecture. Afterwards, assisted by Schreber, the Strangers change the inhabitants' memories using an injection containing the new memories. Murdoch learns that he came from a coastal town called Shell Beach, which everyone knows, though no one remembers how to get there and Murdoch's attempts to visit fail. The Strangers inject a copy of the memories given to Murdoch into one of their men, Mr. Hand, hoping it will help them predict Murdoch's movements and track him down. Inspector Bumstead catches Murdoch, though he acknowledges that Murdoch is most likely innocent, as he has misgivings about the city's nature. They confront Schreber, who explains the Strangers' nature. They are extra-terrestrials residing in human corpses who share a hive mind, and are experimenting with humans to analyze individuality in hopes of making a discovery that will help their race to survive. Murdoch, as Schreber reveals, is an anomaly who inadvertently awoke before Schreber could implant his latest identity as a murderer. Murdoch and Bumstead take Schreber and attempt to reach Shell Beach but instead end up at a poster for the town on a wall at the edge of the city. Frustrated, Murdoch and Bumstead break through the wall, revealing outer space, just before some of the Strangers, including Mr. Hand, arrive with Emma as a hostage. In the ensuing fight, Bumstead and one of the Strangers fall through the hole and drift out into space, and the city is shown to be a deep space habitat surrounded by a force field. The Strangers bring Murdoch to their home beneath the city and force Schreber to imprint Murdoch with their collective memory, believing Murdoch to be the culmination of their experiments. Against their order, Schreber instead injects Murdoch with memories of decades of training about the Strangers, their machines, and tuning. Murdoch awakens with his powers fully realized. He frees himself and battles the Strangers, eventually defeating their leader Mr. Book in a psychokinetic fight high above the city. After learning from Schreber that Emma has been re-imprinted and cannot be restored, Murdoch employs his powers, amplified by the Strangers' machines, to create a real Shell Beach within the habitat. On his way home, Murdoch encounters a dying Mr. Hand and informs him that the Strangers searched in the wrong place—the mind—to understand humanity. He rotates the habitat toward the star it had been turned away from and the city experiences sunlight for the first time. Opening a door leading out of the city, Murdoch steps out to view the sunrise. On the pier in front of him is the woman he knew as Emma, who now has new memories and a new identity as Anna. Murdoch reintroduces himself and they walk to Shell Beach, beginning their relationship anew.

Eva Khatchadourian, once a successful travel writer, lives alone in a rundown house and works in a travel agency near a prison, where she visits her son, Kevin, who has been convicted of mass-murdering students at his high school. As she copes with the hostility of her neighbors, she reflects upon her memories of raising him. Despite being a reluctant mother, Eva decides to start a family with her husband, Franklin, giving birth to Kevin. From childhood, Eva views Kevin as detached and difficult. He appears to loathe and deliberately antagonize Eva, who struggles to bond with him. As a baby, he cries incessantly, but only around her; as a child, he resists toilet training, rebuffs Eva's attempts at affection, and shows no interest in anything. He behaves like a happy, loving son in front of his father, Franklin, who dismisses Eva's concerns and makes excuses for Kevin's behavior. One day, Eva cannot handle her frustration with Kevin and throws him against the wall, breaking his arm. Kevin tells Franklin he fell. When he touches his scar on his arm, Eva believes he is using the incident to manipulate her. When Kevin is confined to bed with a fever, he shows affection towards Eva for the first time as she reads Robin Hood, though his spiteful behavior returns as soon as he recovers. Franklin gives Kevin a bow and arrow and teaches him archery. Sometime later, Eva gives birth to their second child, Celia, a lively and cheerful girl towards whom Kevin is instantly disdainful. A few years later, Celia's pet guinea pig mysteriously goes missing. Eva finds its remains in the garbage disposal the next day, which she unclogs with drain cleaner. Celia is blinded in one eye after being exposed to the cleaner while Kevin was tasked with watching her, requiring her to wear a glass eye in its place. Eva suspects Kevin injured his sister on purpose, but Franklin defends him. Tired of Eva's distrust of their son, Franklin discusses divorce with her, and Kevin overhears their conversation. Three days before his 16th birthday, Kevin uses bicycle locks to trap several students in the school gymnasium and murders them with his bow and arrows. After witnessing Kevin's arrest and the bodies of his victims being carried away, Eva returns home to discover that Kevin has murdered Franklin and Celia as well. On the second anniversary of the massacre, Eva visits Kevin in prison. His demeanor has changed to demure and frightened in anticipation of turning 18 and being transferred to an adult prison. Eva asks him why he committed the murders. Kevin responds that he used to think he knew but is no longer sure. An officer informs that the visit time is over. Eva embraces Kevin and leaves.

On November 9, in Palm Springs, Nyles wakes up and fails to consummate sex with his girlfriend Misty. That evening, Nyles attends a wedding reception for Tala and Abe. There, he bonds with the maid of honor, Tala's depressed half-sister Sarah. Nyles and Sarah leave the party to have sex in the nearby desert. As he undresses, Nyles is hit by an arrow shot by an assailant, then he crawls into a cave, warning Sarah not to follow him. Concerned for Nyles, she follows him and is sucked into a vortex. Sarah wakes up and realizes that it is November 9 again. She confronts Nyles, and he explains that by following him into the cave, Sarah has become stuck in a time loop with him; falling asleep or dying resets the loop, repeating November 9. Nyles reveals that the man who shot him, Roy, is from the wedding and that Nyles inadvertently trapped him in the time loop. For revenge, Roy sometimes hunts down Nyles, as he enjoys putting him through pain even though his "deaths" are only temporary. Sarah tries various methods to escape the loop, but is unsuccessful. Nyles, having already been in the loop for a long time, has become complacent and carefree, abandoning hope of escape. Sarah resigns herself to her fate and adopts Nyles' carefree and reckless lifestyle. Nyles and Sarah become close. They begin to look forward to their days together, where they are free to do anything without consequence. One night, Nyles and Sarah camp out in the desert, get high, and have sex. The day after, Sarah sleeps in and is woken up by Abe, with whom she had sex on November 8, the night before the wedding. Guilt-ridden, Sarah refuses to talk to Nyles about their previous night, expressing nihilism about their life in the loop. After being pulled over by Roy disguised as a cop, Sarah runs him over. She and Nyles argue, leading him to admit that he had sex with Sarah many times in the loop, something he previously lied about. An angry Sarah starts avoiding Nyles. Nyles feels lost without Sarah and spends days aimlessly moping, discovering Abe and Sarah's affair in the process. One day, Nyles visits Roy at his home in Irvine. Having now experienced a painful injury at the hands of Sarah, Roy realizes what he has put Nyles through, and they reconcile. Meanwhile, Sarah spends her days studying to become an expert in quantum physics and general relativity. After some experimentation, she believes that exploding oneself in the cave will break the time loop. Sarah offers Nyles a chance to escape with her, but he confesses his love for her and asks if they can stay in the loop together forever. She refuses, resolved to try her escape plan without him. Sarah attends the wedding one last time, giving a heartfelt speech to Tala, and then travels to the cave with explosives. Nyles has a change of heart, and rushes to the cave to leave with her. He declares that he would rather die with her in an explosion than remain in the loop alone. Sarah reciprocates his feelings, and they kiss in the cave, as she presses the detonator. The two then relax in the pool of a nearby house, which Nyles had shown Sarah during one of their loops. The residents return and catch them there, which seems to indicate that the plan has worked and it is now November 10. In a mid-credits scene, Roy, having gotten a voicemail from Sarah explaining her plan to escape the loop, returns to the wedding and asks Nyles if the plan would work. Nyles does not recognize Roy, who smiles, realizing that Nyles is out of the time loop.

An American family – Dr. Ben McKenna, his wife, popular singer Jo Conway, and their son Hank – are vacationing in French Morocco. Traveling from Casablanca to Marrakesh, they meet Frenchman Louis Bernard. He seems friendly, but Jo is suspicious of his many questions and evasive answers. Bernard offers to take the McKennas to dinner, but cancels when a suspicious-looking man knocks at the McKennas' hotel-room door. At a restaurant, the McKennas meet friendly English couple Lucy and Edward Drayton. The McKennas are surprised to see Bernard arrive and sit elsewhere, apparently ignoring them. The next day, visiting the local marketplace with the Draytons, the McKennas see a man chased by police. After being stabbed in the back, the man approaches Ben, who discovers he is Bernard in disguise. The dying Bernard whispers that a foreign statesman will be assassinated in London and that Ben must tell the authorities about "Ambrose Chappell". Lucy returns Hank to the hotel while Ben, Jo and Edward go to a police station for questioning about Bernard's death. An officer explains that Bernard was a French Intelligence agent. Ben receives a phone call at the police station; Hank has been kidnapped but will not be harmed if the McKennas say nothing to the police about Bernard's warning. Knowing Hank was left in Lucy's care, Ben dispatches Edward to locate him. When Ben and Jo return to the hotel, they discover Edward checked out. Ben realizes the Draytons are the couple Bernard was looking for and are involved in Hank's abduction. When he learns the Draytons are from London, he decides he and Jo should go there and try to find them through Ambrose Chappell. In London, Scotland Yard 's Inspector Buchanan tells Jo and Ben that Bernard was in Morocco to uncover an assassination plot; they are instructed to contact him if they hear from the kidnappers. Leaving Jo's friends in their hotel suite, the McKennas search for a person named Ambrose Chappell. Jo realizes that "Ambrose Chapel" is a place, and the McKennas arrive at the chapel to find Edward leading a service. Jo leaves the chapel to call the police. After Edward sends his congregation home, Ben confronts him and is knocked out and locked inside. Jo arrives with the police, but they cannot enter without a warrant. Jo learns that Buchanan has gone to a concert at the Royal Albert Hall, and asks the police to take her there. Once the police and Jo leave, the Draytons take Hank to a foreign embassy. In the Royal Albert Hall lobby, Jo sees the man who came to her door in Marrakesh. When he threatens to harm Hank if she interferes, she realizes he is the assassin sent to kill the foreign prime minister. Ben escapes the chapel through its bell tower and reaches the Royal Albert Hall, where Jo points out the assassin. Ben searches the balcony boxes for the killer, who is waiting for a cymbal crash to mask his gunshot. Just before the cymbals crash, Jo screams and the assassin misses his mark, only wounding his target. Ben struggles with the would-be killer, who falls to his death. Concluding that Hank is likely to be at the embassy, but that it is sovereign and exempt from an investigation, the McKennas secure an invitation from the grateful prime minister. The ambassador organized the plot to kill the prime minister, and blames the failed attempt on the Draytons. Knowing that Hank can testify against them, he orders the Draytons to kill the boy. The prime minister asks Jo to sing. She loudly performs " Que Sera, Sera ", so that Hank will hear her. Lucy, who is guarding Hank while Edward prepares to murder him, is distressed at the prospect of killing a child, so she encourages the boy to whistle along with the song. Ben finds Hank. Edward tries escaping with them at gunpoint, but when Ben hits him, he falls down the stairs to his death. The McKennas return to their hotel suite. Ben explains to Jo's now-sleeping friends, "I'm sorry we were gone so long, but we had to go over and pick up Hank."

Unemployed number theorist Max Cohen, who lives in a drab apartment in Chinatown, Manhattan, believes everything in nature can be understood through numbers. He suffers from cluster headaches, extreme paranoia, hallucinations, and schizoid personality disorder. His only social interactions are with his mathematics mentor, Sol Robeson (now disabled from a stroke), and those who live in his building: Jenna, a little girl fascinated by his ability to perform complex calculations, and Devi, a young woman living next door who sometimes speaks with him. Max tries to program his computer, named Euclid, to make stock predictions. Euclid malfunctions, printing out a seemingly random 216-digit number, as well as a single stock pick at one-tenth its current value, then crashes. Disgusted, Max throws away the printout. The next morning, he learns that Euclid's pick was accurate but cannot find the printout. When Max mentions the number, Sol becomes unnerved and asks if it contained 216 digits. He reveals that he came across the same number years ago and urges Max to take a break from his work. Max meets Lenny Meyer, a Hasidic Jew who does mathematical research on the Torah. Lenny demonstrates some simple Gematria, the correspondence of the Hebrew alphabet to numbers, and explains that some people believe the Torah is a string of numbers forming a code sent by God. Intrigued, Max notes that some of the concepts parallel other mathematical concepts, such as the Fibonacci sequence. Agents of a Wall Street firm approach Max. One of them, Marcy Dawson, offers him a classified computer chip called "Ming Mecca" in exchange for the results of his work. Using the chip, Max has Euclid analyze mathematical patterns in the Torah. Once again, Euclid displays the 216-digit number before crashing. As Max writes down the number, he realizes that he knows the pattern, undergoes an epiphany, and loses consciousness. After waking up, Max appears to become clairvoyant and visualizes the stock market patterns he sought. His headaches intensify, and he discovers a vein-like bulge protruding from his right temple. Max has a falling-out with Sol after Sol urges him to quit his work. Dawson and her agents grab Max on the street and try to force him to explain the number, having found the printout Max threw away. Attempting to use the number to manipulate the stock market, the firm instead caused the market to crash. Driving by, Lenny rescues Max, but takes him to his companions at a nearby synagogue. They ask Max to give them the 216-digit number, believing it was meant for them to bring about the Messianic Age, as the number represents the unspeakable name of God. Max refuses, insisting the number has been revealed to him alone. Max flees and visits Sol, only to learn from his daughter, Jenny, that he died from another stroke. He finds a piece of paper with the number in his study. At his own apartment, Max experiences another headache but does not take his painkillers. Believing the number and the headaches are linked, Max tries to concentrate on the number through his pain. After passing out, Max goes to the bathroom where he stares at himself in the mirror before lighting a match and burning the piece of paper with the number. Max then takes a power drill to his own head, trepanning himself in an effort to find relief. Sometime later, Jenna approaches Max in a park and asks him to do several calculations, including 748 ÷ 238 (an approximation for pi). Max smiles and says that he does not know the answer, seemingly at peace.

"Time destroys everything" (French: "Le temps détruit tout"). "Time reveals everything" (French: "Le temps révèle tout"). Alex and Marcus, a young couple, wake up together and discuss their relationship, as well as an upcoming party, while in the nude. Marcus voices concern about Alex's ex, Pierre, also being invited because he "stole his girl", to which Alex responds that he did not steal anything, because she is not an object and it was all her decision. Alex reveals she had a dream of herself standing in a red tunnel that breaks in two. The two talk about a potential pregnancy and Marcus expresses hope in one before Alex takes a pregnancy test, the result of which is never shown, but she seems particularly pleased with. On a public train, Pierre, Alex's ex who is also invited to the party, constantly bickers with Alex over his inability to satisfy her during their relationship, while Marcus shows no interest in their squabble. Alex explains to Pierre that he always focused too much on her, and a sexual partner can feel and is aroused by their partner's pleasure. At the party, Marcus gets drunk and takes cocaine, much to Alex's disapproval. She leaves the party, asking Pierre to look after Marcus. Alex descends into a red pedestrian underpass on her way back to the train when she notices a transgender prostitute getting attacked by a man. He immediately turns his attention to Alex, anally raping her before savagely beating her into unconsciousness. After Marcus and Pierre discover Alex being taken away by paramedics, they encounter street criminals Mourad and Layde, who offer to help them find the culprit. They use an ID left at the scene by the prostitute to locate her. Marcus verbally assaults Concha, the prostitute, and threatens to cut her face open in order to gather that the rapist's name is Le Ténia ("the tapeworm ") and that he frequents a gay BDSM club called Rectum. The men are chased off by other prostitutes; Marcus and Pierre jump into a taxi cab and speed off into the night. When the cab driver doesn't know where Rectum is, Marcus attacks the driver, stealing his vehicle. The two end up finding the club's location, with Pierre reluctantly following behind Marcus. Leading the charge, Marcus proceeds to get into a fight with a man he suspects of being Le Ténia, who overpowers him and breaks his arm before attempting to rape him. Pierre comes to his rescue and beats the man to death with a nearby fire extinguisher as the man's companion, the actual rapist, watches in amusement. Marcus is carried out of Rectum on a stretcher while Pierre is arrested by police as Mourad and Layde deride them. Meanwhile, in a nearby small apartment, a man named the Butcher tells a friend that he was arrested for raping his daughter before dismissing the commotion going on outside.

British diplomat and avid horticulturalist Justin Quayle is confronted by Amnesty International activist Tessa during a lecture in London. They strike up a romance, and marry after she accompanies him to his posting in Kenya. She befriends Belgian doctor Arnold Bluhm, leading to rumours of an affair. Tessa has no qualms confronting corruption, to the chagrin of Justin's superiors, and she loses a child late in pregnancy. Tessa and Arnold connect recent local deaths to drug trials being conducted by the Kenyan-based company Three Bees using the drug Dypraxa. They write a damaging report on the drug and Tessa gives it to Justin's colleague Sandy Woodrow, the British High Commissioner, who sends it to Sir Bernard Pellegrin, head of the Africa Desk at the Foreign Office. Pellegrin responds with an incriminating letter to Sandy, which Tessa persuades him to show her, and she steals it before departing for Lokichogio with Arnold. Sandy informs Justin that a white woman and black driver have been killed near Lake Turkana, and that Tessa and Arnold shared a room at Lodwar before hiring a car. Justin and Sandy identify Tessa's mutilated body, but Arnold's whereabouts remain unknown. Police confiscate Tessa's computer and files, but Justin finds her keepsake box, containing a letter from Sandy declaring his love for her and asking her to return Pellegrin's letter, and records of Three Bees' tests. After Tessa's burial, Justin learns from his colleague Ghita that Tessa kept Arnold's secret that he was gay, as homosexuality is illegal in Kenya. Pursuing the truth about his wife's murder, he follows the trail of her report. Justin is briefly detained by police and confronts Three Bees' CEO Kenny Curtiss, but receives no answers. Returning to London, Justin's passport is confiscated. He dines with Pellegrin, who lies that Arnold must have murdered Tessa, and believes that Justin has his incriminating letter. Justin meets with Tessa's cousin and lawyer Ham, and they access her computer files to reveal her investigation into Dypraxa and its manufacturer, Swiss - Canadian pharmaceutical conglomerate KDH, which hired Three Bees to test the drug on unsuspecting Kenyans as a treatment for tuberculosis. Justin receives a threatening note and Ham provides him with a fake passport to travel to Germany to meet with Tessa's contact Birgit. She is part of a pharmaceutical watchdog group and is reluctant to speak due to the targeting of her group. Justin is attacked in his hotel room and warned to stop investigating. Arnold's body is found having been tortured to death, while the announcement of a safe Dypraxa causes KDH's share price to soar. Returning to Kenya, Justin confronts Sandy, who admits that Tessa's report was silenced to save KDH from spending millions redeveloping the drug. Justin is approached by Curtiss, who has been betrayed by KDH, and brought to a mass grave of Dypraxa test subjects. Curtiss points Justin to Dr Lorbeer, Dypraxa's inventor, who has fled to Sudan. Tim Donohue, a friend in British intelligence, confirms that Pellegrin had Tessa and Arnold killed. Unable to convince Justin to return home, he gives him a gun. Justin travels to confront Lorbeer, who is treating remote villagers to atone for the lives claimed by his drug. The village is attacked by raiders, but Justin and Lorbeer escape in a UN aid plane, and Lorbeer reveals that he has Pellegrin's letter. Tessa convinced him to record the truth about Dypraxa, but he changed his mind, instead informing KDH that Tessa and Arnold were en route to expose the company to the UN. Justin convinces the pilot to mail Pellegrin's letter to Ham, and to drop him off at Lake Turkana. Removing the bullets from his gun, his final thoughts are of Tessa before he is killed by KDH's henchmen. In London at Tessa and Justin's memorial service, Pellegrin lies that Justin committed suicide in the same place his wife died. Ham announces the reading of an epistle, but instead reads Pellegrin's letter, exposing the deaths caused by Dypraxa and the subsequent coverup. Pellegrin storms out as Ham implicates the British government, KDH, and public complacency regarding the human cost of medicine they take for granted.

Dr. Jeremy Stone recounts the events before the United States Senate Committee on Space Sciences in 1971: After a U.S. government satellite crashes near the small rural town of Piedmont, New Mexico, on February 5, nearly all the residents are dead. A military recovery team from Vandenberg Air Force Base sent to recover the satellite dies while trying to do so. Suspecting that the satellite has brought back an alien organism, the military activates an elite team of scientists. Dr. Stone, the team leader, and Dr. Mark Hall, a surgeon, are dropped in by helicopter. They discover the town's doctor opened the satellite in his office and that all of his blood has crystallized into a powder, the same death befalling nearly all of the town. Stone and Hall retrieve the satellite and find two survivors, 69-year-old alcoholic Peter Jackson and six-month-old crying infant Manuel Rios. The elite team also includes Dr. Charles Dutton and Dr. Ruth Leavitt, who join them at a top-secret Nevada underground facility, code named Wildfire. They go through four sub-levels of decontamination procedures, arriving at the fifth sub-level laboratories. If the organism threatens to escape, the Wildfire facility includes an automatic nuclear self-destruct mechanism to incinerate all infectious agents. Under the " odd-man hypothesis ", Dr. Hall is entrusted with the only key that can deactivate the device, the theory being that an unmarried male is the most dispassionate person within a group to make critical decisions in a crisis. Examining the satellite, the team discovers the microscopic alien organism that caused the deaths. The greenish, throbbing life form is assigned the code name "Andromeda." Infecting through the lungs, Andromeda kills biological life almost instantly via a blood clot in the brain and asphyxiation. It appears to be highly virulent. The team studies the organism using animal subjects, an electron microscope, and culturing in various growth media to learn how it behaves. The microbe contains the hydrogen and carbon required for terrestrial life and appears to have a crystalline structure, but lacks the DNA, RNA, proteins, and amino acids present in all forms of terrestrial life, and directly transforms energy to matter with no discernible byproducts. Hall tries to determine why the two Piedmont residents survived. Unknown to the others, Leavitt's research on the germ is impaired by her undisclosed epilepsy. A military jet crashes near Piedmont after the pilot radios that his plastic oxygen mask is dissolving. Hall realizes that the alcoholic Jackson survived because his blood was too acidic from drinking Sterno, and that the baby lived due to his blood being too alkaline from constant crying, suggesting that Andromeda can survive only within a narrow range of blood pH. Just as he has this insight, the organism mutates into a non-lethal form that degrades synthetic rubber and plastic. Andromeda escapes the biocontainment room into the laboratory where Dutton is working. When Andromeda causes all the laboratory's seals to start decaying, a five-minute countdown to nuclear destruction is initiated. Hall rescues Leavitt from an epileptic seizure, triggered by the flashing red lights of Wildfire's alarm system. The team discover that the microbe would thrive on the energy of a nuclear explosion and would consequently be transformed into a super-colony that could destroy all life on Earth. Hall races to reach a functioning station where he can disable the nuclear bomb with his key. He endures multiple attacks by automated lasers as he climbs through the laboratory's central core. He finds a working station, disables the bomb with seconds to spare, and collapses. Hall awakens in a hospital. His colleagues reveal that clouds are being seeded over the Pacific Ocean, which will cause rain to sweep Andromeda from the atmosphere and into alkaline seawater, rendering it harmless. Stone finishes testifying by saying that while they were able to defeat the alien pathogen, they may be unable to do so in the future. The film ends with a computer feed suddenly stopping and the computer flashing the number "601", the Wildfire code for information coming in too fast to analyze.

When 17-year-old Tanja Lorentzen is found murdered in the city of Tromsø, far up in the Norwegian Arctic, Kripos police officers Jonas Engström (Stellan Skarsgård) and Erik Vik (Sverre Anker Ousdal) are called in to investigate. Engström, formerly with the Swedish police, moved to Norway after being caught having sex with the main witness in one of his cases. Vik is nearing retirement age, and his memory is failing. Engström devises a plan to lure the murderer back to the scene of the crime, but the stakeout is blown and the suspect flees into the fog, shooting one of the Norwegian police officers in the leg. Unbeknownst to his unarmed colleagues, Engström carries a gun from his days in the Swedish police, who routinely carry firearms. Firing at what he believes to be the suspect, Engstrom accidentally kills Vik, who had mistakenly run right instead of left as ordered. Realizing that everyone assumes Vik was shot by the fugitive, Engström decides not to admit his culpability. When one of his colleagues, Hilde Hagen (Gisken Armand), is assigned to investigate Vik's death, Engström becomes worried about ballistic fingerprinting and tampers with evidence to support his story. Haunted by guilt and unable to sleep with the midnight sun of the Arctic, Engström becomes increasingly unhinged and starts hallucinating about Vik. Engström learns from one of Tanja's friends that she had been seeing Jon Holt (Bjørn Floberg), a crime novelist. He correctly deduces that Holt killed Tanja, but Holt reveals that he saw Engström shoot Vik. The two decide to frame Tanja's boyfriend Eilert for her murder, with Engström later planting Holt's gun under Eilert's bed and Holt giving testimony about Eilert being abusive. However, Hagen is not convinced, and when new evidence emerges, Engström knows that it is only a matter of time until Holt is arrested. Engström tracks Holt to some waterfront properties that are slowly collapsing into the sea. Holt suspects that Engström has come to kill him and holds him at gunpoint, explaining how he killed Tanja in a fit of rage when she rejected his advances. Holt tries to flee across a pier, but the rotten floorboards give way and he falls into the water below, striking his head on the way down. He drowns as Engström watches. When Engström searches Holt's nearby house, he finds Tanja's dress, which Holt had removed before dumping the body. With Holt dead, and definitive proof he was the murderer, the case is closed. Just before he leaves town, Engström is visited by Hagen, who shows him a cartridge case found at the site where Vik was shot. She notes it is a Norma, which Engström confirms is a brand used by the Swedish police. Engström expects Hagen to arrest him, but instead she simply places the cartridge on a table and leaves. Engström drives out of town, his face and eyes showing great weariness, and he seems not to have recovered from his insomnia.

In Nightmute, Alaska, teenager Kay Connell is found beaten to death, her body scrubbed of forensic evidence and dumped naked in a landfill. At the request of the local chief, LAPD detectives Will Dormer and Hap Eckhart are sent to assist with the investigation. Ellie Burr, a young local detective who idolizes Dormer, is assigned as their guide. They question Kay's abusive boyfriend Randy Stetz, who admits he discovered Kay had a secret admirer but could not force her to reveal his identity. In private, Eckhart admits he is being pressured by an Internal Affairs investigation and will testify against Dormer in exchange for immunity. Kay's backpack is discovered at a shack near the coast and Dormer uses it to set a trap, but this backfires and the suspect flees into a heavy fog, shooting an officer in the leg. Giving pursuit, Dormer spots an unidentifiable figure and fires at them with his backup weapon after his sidearm jams. Grabbing a.38 caliber pistol the suspect dropped, Dormer rushes to the figure and discovers he has shot and killed Eckhart. The police assign blame to the suspect and Dormer does not dissuade them, knowing Internal Affairs will never believe the shooting was an accident due to Eckhart's pending testimony. Burr is assigned to the shooting investigation and finds the.38 bullet that pierced the officer's leg. That night, Dormer fires the.38 into an animal carcass, then retrieves and cleans the bullet. At the morgue, the pathologist gives him the 9 mm caliber bullet from Eckhart's body, which she doesn't recognize as very few people in the area own pistols. Dormer replaces it with the.38 bullet. When Burr believes the case is closed, however, Dormer's conscience refuses to let him sign off and he tells her to do another review, which causes her to notice inconsistencies in his statement. Dormer becomes plagued by insomnia, brought on by his guilt and further exacerbated by the perpetual daylight. He begins receiving phone calls from the killer, who witnessed Dormer shoot his partner. Questioning her estranged best friend, Dormer learns Kay was a fan of local crime writer Walter Finch, and realizes he was her secret admirer based on the alias she gave him. Dormer goes to Finch's apartment in a nearby village and breaks in, hiding the.38 in a heating vent. Returning home, Finch realizes someone is inside and escapes after a chase. Finch contacts Dormer again and arranges a public meeting on a ferry. Finch wants help shifting suspicion to Randy, offering to stay silent about the Eckhart shooting in return. Attempting to dissuade him from this, Dormer tells Finch he can't hide his relationship with Kay and gives advice on handling the inevitable police questioning. As Finch leaves the ferry, he reveals he has recorded the conversation. In another phone call, Finch admits he flew into a blind rage after Kay laughed at his romantic advances, stressing that her death was "an accident." Having lied that he lost the gun, Dormer suggests Kay's dress would be sufficient evidence to implicate Randy. The next day, Finch is questioned and mentions that Kay described Randy's abuse to him in her letters. Finch then claims Randy threatened Kay with a gun, and Dormer realizes his trap has again failed. Randy is arrested when the.38 is found in his house. Finch asks Burr to come to his lake house the next day to collect Kay's letters. Returning to the cabin, Burr discovers a 9mm shell casing. She reads her police academy thesis about one of Dormer's cases and realizes he carries a 9mm as a backup weapon. After trashing his room in an attempt to block the sunlight coming through the window, Dormer confides in the hotel clerk about the Internal Affairs investigation: he fabricated evidence against a pedophile he was certain had murdered one of his victims, and the conviction (among many others) would have been overturned had Eckhart testified. When he tries to justify this to himself, the clerk asks him if it's something he's willing to live with. Dormer breaks into Finch's apartment again and discovers Kay's letters. Realizing Burr is being lured into a trap, he rushes to Finch's lake house, where Finch reveals he has Kay's dress before knocking Burr unconscious. Dormer arrives and confronts Finch, but is disorientated from lack of sleep and overpowered before Burr revives and drives Finch off. She tells Dormer she knows he shot Eckhart, and he admits he is no longer certain it was an accident. Finch retrieves a shotgun from his boathouse and begins shooting; Burr returns fire while Dormer outflanks Finch. In a struggle Dormer wrestles the shotgun away, but Finch draws Burr's gun and they shoot each other, resulting in both of them being respectively wounded and killed. Attempting to comfort the mortally wounded Dormer, Burr moves to throw away the shell casing that proves his guilt. Dormer stops her, telling her not to lose her way as he did, before dying.

On the night that Miller's Comet passes Earth, eight friends gather for a dinner party at the home of couple Mike and Lee. Emily is hesitant to accompany her boyfriend Kevin on an extended business trip abroad. Amir has brought Kevin's ex-girlfriend Laurie, who flirts inappropriately with Kevin. A power outage occurs. Mike and Lee get out candles and colored glow sticks. The friends each take a blue glow stick and venture outside, where the neighborhood is dark except for one house that has lights. Back inside, they notice a broken glass no one remembers damaging. Amir and Hugh decide to ask to use the phone at the lit-up house, as Hugh's physicist brother had insisted Hugh call him if "anything strange" were to happen during the comet's passing and as no one's mobile phone has a signal. Hugh and Amir return. Hugh has a cut forehead and Amir has brought back a box he found at the other house containing a ping-pong paddle and photographs of everyone with numbers written on the backs. Hugh says he looked through the window of the other house and saw a table set for eight. They surmise the other house might be an alternate version of theirs. Hugh writes a note to leave at the other house, only to find an exact copy of the note pinned to their own door. Emily, Kevin, Mike, and Laurie decide to go to the other house. On the way, they encounter another group of four people who look like them, carrying red glow sticks rather than blue. Each group flees back to their houses. Hugh retrieves his brother's book from his car, which deals with quantum decoherence. They speculate that the comet has created mirror realities, one of which will collapse after the comet has passed. They surmise that anyone passing through a particularly dark area outside will emerge into a different reality. Mike drinks heavily and considers killing their doubles before the doubles can kill them. He decides to write a blackmail note to the other Mike to keep him from the book. The group realizes Hugh and Amir, in their midst, came from the other house. The two take the box and leave, then return carrying blue glow sticks. They had found two notes at the other house, showing that the split created more than just two alternate realities. Beth sees Laurie kissing Kevin in the hallway. Someone outside smashes Hugh's car window. Emily retrieves the ring Kevin gave her from her car. Talking to Kevin, Emily realizes she is from a different reality. The group creates their own box to validate they are all from the same reality. In addition to numbering the photographs by rolling dice, they include a randomly chosen object. Emily deduces that only Lee and Beth, who never left the house, originate from that house; she herself, Kevin, and Laurie are from a different house; Hugh and Amir are from a third house; and Mike is from a fourth. The blackmail note arrives under the door, revealing an adulterous liaison between Mike and Beth. Another Mike breaks in, attacks his double and leaves. Emily goes out and looks into several alternate houses until she finds one in which no one seems aware of the split. She lures everyone out of the house by smashing Hugh's car window, then ambushes the alternate Emily, sedating her with ketamine when she gets a ring out of her car and locking her in the trunk. She takes her other self's place while Miller's Comet breaks apart overhead, but must subdue and hide another Emily who crawls into the bathroom. She takes the ring from her defeated self after losing her own in the altercation, then returns to the living room, where she passes out. Emily wakes in daylight on the sofa with the rest of the party apparently none the wiser. Kevin returns her ring, which he found in the bathroom. His cell phone rings; bizarrely, Emily is calling. Emily looks at the two rings as Kevin answers the phone and then turns to look at her.

Corporate engineer Joe Ross has invented a potentially lucrative "process", the precise nature of which is never revealed. While on a retreat on the island of St. Estèphe, he meets wealthy stranger Julian "Jimmy" Dell and attracts the interest of one of the company's new secretaries, Susan Ricci. Jimmy wants to introduce Joe to his sister, an Olympic-class tennis player, in New York and asks him to deliver a package to her. Susan sits near Joe on the airplane back to New York, converses with him about how "you never know who anybody is," and talks about unwitting drug mules. Suddenly afraid the package might contain something illegal, he opens it on the plane but finds only a 1939 edition of the book Budge on Tennis, which he damages while opening. Once home, he buys an intact copy of the book and drops it at Jimmy's sister’s building, keeping the original at his office. Jimmy suggests that Joe's boss, Mr. Klein, might not give him fair retribution for his work. Jimmy invites Joe to dinner, and seemingly on a lark opens a Swiss bank account for him with a token balance of 15 Swiss francs. Taking him to dinner at a club requiring membership, Jimmy has Joe sign a certificate to join. Over dinner, he advises Joe to consult legal counsel about his position in the company regarding the Process. He invites Joe to meet with his own lawyer and tells him to bring along the only copy of the Process. Joe soon learns that Jimmy's sister does not exist, and realizes Jimmy is a con artist attempting to steal the Process. Joe contacts Pat McCune, a woman he met on the island who Susan told him was an FBI agent, and whose business card Susan had kept. McCune’s FBI squad enlists him in a sting operation to catch Jimmy. While fitting Joe with a wire for his planned meeting with Jimmy, an FBI agent explains the Spanish Prisoner con, a version of which Jimmy has been running on Joe. When Jimmy never shows up for the meeting, Joe realizes McCune is actually part of Jimmy's con game, and that the Process has just been stolen. Joe attempts to explain what happened to his employer and the police but finds that Jimmy has made it appear that he has sold his Process to the Japanese. The Swiss bank account that Jimmy opened for him makes it look as though he is hiding assets, and the certificate he signed to join the club turns out to be a request for political asylum in Venezuela, which has no extradition treaty with the United States. The police show Joe that Jimmy's apartment is a façade and that the club's members-only room is a normal restaurant. Joe is also framed for the murder of the company lawyer, George Lang. On the run, Joe reconnects with Susan, who says she believes his story. Joe remembers that the hotel on the island maintains video surveillance, which could prove that Jimmy was there. Susan takes him to the airport so he can fly back to the island. Seeing a police roadblock on the way to the airport, she convinces him to drive to Boston. At the airport in Boston, Susan gives Joe a plane ticket, and a camera bag, which unbeknownst to him contains a gun. Before passing through security, he realizes that Jimmy left his fingerprints on the book Joe was to deliver. He leaves the airport with Susan, still not realizing she is working against him. They purchase ferry tickets to return home. While Susan leaves to call Klein to inform him about the book, Joe attempts to board the ferry with the plane ticket, only to realize the ticket is for Venezuela, and that he was being set up. On the ferry, Jimmy suddenly appears and Susan turns on Joe; the final step of the con will be Joe's death, made to appear as a suicide. Jimmy reveals what he has done with the Process, and turns his gun on Joe, but is tranquilized by US Marshals pretending to be Japanese tourists. They reveal that they have been following Jimmy for months and that Mr. Klein plotted the con to keep all the profits for himself. Susan asks Joe for mercy, but he nonchalantly tells her she must "spend some time in room", meaning prison.