Once again Detroit is ridden by a gang of drug dealers, and Robocop is the only one who can do something about it. When Cain, the chief of the gang, is killed during his confrontation with Robocop, OCP (the company that runs the police) transforms him into Robocop 2, a new android much stronger than the first. Now Murphy has to face him again, because Cain didn't forget who he was.