Johnny Mnemonic (film) - Plot

Plot

In 2021, Johnny (Keanu Reeves) is a "mnemonic courier" with a data storage device implanted in his brain, allowing him to discreetly carry information too sensitive to transfer across the Net, the virtual-reality equivalent of the Internet. While lucrative, the implant has cost Johnny his childhood memories, and he seeks to have the implant removed to regain these; his handler, Ralfi (Udo Kier) assigns him one more job that would cover the costs of the operation, sending Johnny to Beijing. At the designated place, he finds a group of frantic scientists who have the data he is to carry, but it far exceeds Johnny's storage capacity, even with the use of compression. Johnny accepts the job anyway, well aware of psychological damage and potential death risks should he not be able to remove the data in time. After uploading their data, the group is attacked by Yakuza, but Johnny manages to escape with a portion of the encryption password.

After contacting Ralfi, Johnny returns to Newark and soon finds that two groups are after the data he carries. One are agents of the international pharmacological company, Pharma-Kon, led by its United States executive, Takahashi (Takeshi Kitano), who believes the data to be critical to the company's interests. The other is the Yakuza guided by Shinji (Dennis Akayama), who wishes to deny this information to Takahashi and claim it for themselves. Johnny soon learns that Ralfi is in the Yakuza's employ, and ready to kill Johnny to extract the data storage hardware. Jane (Dina Meyer), a cybernetically-enhanced bodyguard, helps Johnny to escape, and aided by the Lo-Teks, an anti-establishment group led by J-Bone (Ice-T), they elude their pursuers. Jane takes Johnny to meet her friend and street doctor Spider (Henry Rollins) who had installed Jane's implants. In discussions, Spider reveals he and his allies at a local clinic were to be the recipients of Johnny's data, supposedly Pharma-Kon's unpublished cure for "nerve attenuation syndrome" (NAS), a plague ravaging mankind due to the over-reliance on technology and causing political strife. Though Spider could remove Johnny's implant, this may cause both the loss of this invaluable data as well as Johnny's life; instead, Spider directs Johnny to "Jones" that resides at Heaven, the Lo-Tek base built on the underside of the Brooklyn Bridge. The clinic is soon invaded by the assassin Karl, the Street Preacher (Dolph Lundgren), hired by Takahashi to retrieve Johnny's head before Shinji can; Spider is killed while Johnny and Jane escape.

At Heaven, they find that Jones is a dolphin, once part of the Navy for his decryption capabilities. Jones attempts to discover the remainder of the password to the data, but Heaven is soon attacked by the Yakuza, Takahashi's forces, and the Street Preacher. Johnny, Jane, and the Lo-Teks fight off all three groups and emerge victorious, killing Takahashi, Shinji, the Street Preacher, and their agents. Takahashi, in a dying gesture, provides Johnny with a portion of the remaining password to the data. While this helps, Johnny is told by J-Bone that he must "hack his own brain" to find the final portion, unlocking the data so that the Lo-Teks can download it and transmit it across the globe. Johnny and Jones again start the procedure, but find themselves helped by a mysterious artificial intelligence from Pharma-Kon's mainframe, providing the last portion of the password. The data for the NAS cure is safely recovered and Johnny discovers he can now recall his memories of his youth, including his mother. As Johnny recovers from the process, he, Jane, and the Lo-Teks observe the Pharma-Kon building on fire, a sign that the cure's transmission was successful.