After a 17-year-old shoots his parents dead and then turns the gun on himself, an investigative reporter makes a disturbing discovery. The adopted boy was born to a mother who, as a teen, inexplicably murdered her parents as well. Even more alarming is the discovery that the dead boy has a twin, who may also be genetically predisposed to kill.

An intelligent android (Michael) constructed by a research team is taken outdoors and successfully passed off as human in a trial run. When the government hears of this, they order their own set of tests in Washington. When the project leader realizes the military want the android for a soldier, he can't accept it, and he and Michael go into hiding to avoid their clutches.