This science fiction adventure, set in the future, depicts an Earth so polluted that people must live underground to avoid the deadly air. It is the sequel to 1989's Circuitry Man. In this new world, people who once would have plugged into drugs for illicit fun, now turn on with computer chips. The evil Plughead, a biosynthetic man, has a revolutionary chip that allows humans to live a decade beyond normal life expectancy but to manufacture it they must torture innocent people until they die. Plughead has no problem with that; in fact, he rather enjoys it. Plughead's nemesis, Danner is also a biosynthetic man, but he is a good guy. FBI agent Kyle is using Danner to help her find Plughead. Together they travel to a barren desert in search of their foe.