In the near future, humanity lives in a technologically advanced, dystopian society. The government requires that everyone receive an ocular implant that records everything they see. The implant provides an augmented-reality head-up display to the user with information about anyone and anything they may see, as well as recording the user's view. Investigations into crimes amount to detectives reviewing video and assessing whether an alleged perpetrator is innocent or guilty. Sal Friedland, a detective with the metropolitan police force, crosses paths with a young woman who appears to trigger a glitch in his ocular implant, as no data about her is retrieved. When he reviews his own record of that day, he finds that every single frame of her has been mysteriously deleted. At work, Sal is handed several homicide cases where the victims' own visual records of their deaths are replaced with the killer's point of view, thus hiding the killer's identity. At another murder scene, Sal chases the apparent killer only to nearly be killed when they hack his implant and change what he sees in real time. It is discovered that all the victims hired someone with the expertise to delete pieces of their visual records that were either humiliating or incriminating. The detectives determine that the unknown woman Sal encountered earlier has the ability to manipulate the system in this way, making her their primary suspect. Sal goes undercover, creating a false history as a stockbroker who engages in a brief affair with a prostitute. Using this as the pretext for her services, he makes contact with the woman —who uses the handle 'Anon'— and asks to have his encounter with the prostitute deleted. With his team on standby in the adjacent apartment, the initial plan to apprehend Anon fails when she successfully covers her tracks. Sal and Anon develop a personal relationship. She discovers Sal's true identity and flees, apparently killing one of Sal's colleagues in the process. Anon begins to harass Sal for his betrayal, tormenting him with his worst memories, deleting his memories of his dead son, and causing further hallucinations. His superiors confront him after his neighbor turns up dead with a bullet from Sal's gun in him rejecting his explanation and order him off the case. Despite being under house arrest, Sal tracks Anon to her apartment and tells her that she is being investigated for multiple murders. She reveals that she already knows this and that she is being framed by another hacker with a similar skillset. Anon shows Sal her video record of the second sting operation, in which his colleague was killed, seeming to prove that she is innocent. After showing Sal her records, she flees again. Believing Sal has become too personally involved, his superiors suspend him from active duty. The actual killer attempts to murder him in his apartment, revealing himself to be Cyrus Frear, one of the technical experts from the police department. Cyrus has been obsessed with Anon for years killing anyone who had sex with her out of jealousy and erased every trace of her, even peoples' memories. During a physical altercation between Cyrus and Anon, Sal draws his weapon, but realizes that Cyrus is seeing what he sees in real-time. To defeat this advantage, Sal fires blindly towards Cyrus, successfully killing him. Anon leaves, later revealing to Sal that she is able to bypass the vast surveillance network by disseminating her records in microsecond slices throughout everyone else in the network, rendering her untraceable. When Sal asks her why she is so desperate to hide her identity, she tells him that her quest for anonymity is not because she has something to hide, but merely because she does not want to share herself with the world.

On a foggy night in 1850, Mary Rutledge and retired Colonel Marcus Aurelius Cobb arrive in San Francisco Bay aboard the clipper ship Flying Cloud. She had come to wed a wealthy owner of a gold mine, but he had lost his mine at the roulette wheel when the ball landed on red 13 times at the Bella Donna, a gambling house and restaurant. The men at the wharf reluctantly inform her that her fiancé is dead, murdered most likely by Louis Chamalis, the powerful owner of the Bella Donna. Mary is upset, but quickly pulls herself together. Mary meets Chamalis and goes to work for him. Chamalis gives her the name "Swan" and showers her with extravagant gifts. Their relationship sours quickly because Swan is angered by Chamalis's destructive power-mongering. She does not, however, mind running a crooked roulette wheel and cheating the miners out of their gold. Colonel Cobb purchases a printing press, with the intention of starting a respectable newspaper for the people of San Francisco. His first issue includes an article criticizing an unpunished murder by Chamalis and his men. When Chamalis finds out, he threatens to destroy Cobb's printing press and burn down the building, but is halted by Swan. Chamalis demands that Cobb never print anything attacking him. The colonel unwillingly complies. Swan becomes disillusioned with her life in San Francisco. Her distant behavior irks Chamalis. One morning, she sets out on horseback. When it begins to rain heavily, she seeks refuge in a seemingly abandoned cabin, where she meets poet and gold miner Jim Carmichael. Swan is taken with him, but lies about her current situation after hearing his criticisms of the city. He gives her his book of poems as a memento. Carmichael decides to return to New York. Because of fog, the ship will not leave for a few days. He meets Chamalis's helper, Old Atrocity, who, seeing his bags of gold is happy to show him to the Bella Donna. Carmichael is surprised to find Mary working there. He is served drugged liquor and plays roulette at her table. He loses his composure, insults Swan and eventually loses his money. Carmichael wakes the following morning in the Bella Donna's kitchen. His eloquent speech impresses Chamalis, who hires him on the spot as a waiter. Carmichael's presence bothers Mary, who offers him money to depart. Carmichael refuses, wishing to earn the fare on his own. Cobb puts up a poster telling about a murder Chamalis ordered and how the Bella Donna cheats customers. Seeing it, Chamalis's henchman "Knuckles" Jacoby shoots both the man who put it up and the publisher when he tries to defend him. Dying, Cobb orders his assistant to print the truth. Vigilantes hang Knuckles. Devastated by Cobb's death, Mary acknowledges her love for Carmichael, and works the roulette table so that he wins back the gold he lost. Chamalis finds out and sets out to kill Carmichael. The lovers decide to leave together. They find a rowboat and attempt to board the ship in the harbor. They have trouble seeing in the fog, but can hear Chamalis pursuing them. He shoots and injures Carmichael, and corners them beneath a pier. Mary begs him, as proof of his love for her, not to kill Carmichael. Chamalis agrees, but tells her he does not want her anymore. The sheriff arrives with a mob, and Chamalis allows himself to be taken away. Mary returns to Carmichael's side aboard the ship as it prepares to set sail.

Archie Andrews, a kindergarten teacher and vegan, regularly buys products from Lorraine's vegetarian roadside stand. He is developing an engine powered by wheatgrass, but his experiments prove unsuccessful until he accidentally cuts his finger and blood drips into the wheatgrass. After the mixture reaches the engine, it begins to operate successfully. Archie tests the vehicle and offers a ride to Denise, the owner of a meat stand and Lorraine's business rival. After Denise shows interest in Archie he drives her home but runs out of fuel. Seeking an alternative source of blood, Archie turns to hunting animals; however, their blood supply proves insufficient. He then targets larger prey, then violent criminals, before eventually killing people indiscriminately. The government, having monitored Archie's progress, approaches him after the original Blood Car is destroyed. Federal agents offer him any position he desires in exchange for helping produce additional Blood Cars and agreeing to the erasure of his former identity. When Archie questions the source of fuel for the new vehicles, the agents explain that it will be obtained from people with disabilities, convicted criminals, and homeless people. Archie accepts the offer. The film concludes with images of his rise to the presidency intercut with scenes of government agents murdering Lorraine, Denise, Archie's kindergarten students, and other individuals connected to the development of the Blood Car.