
Naoto Tamura, a new detective in Central City, is killed by a Bionoid Monster in the line of duty. Doctor Kenzo Igarashi, a man whose experiments had been responsible for the Bioron syndicate's existence, brought the man back to life as a cyborg detective, Jiban.

The metallic cop Jiban goes into action to stop a Bionoid when it seizes a virus that can shut down the computer systems of Japan.

Doctor Giba infiltrates the police using a Bionoid in order to root out and eliminate Jiban.

When produce begins to come to life and attack humans, Naoto tracks it to a suspicious man preparing to expand the operation for Bioron.

The daughter of a biological scientist takes revenge on those that scorned him, drawing her to the attention of Bioron.