Set in a future Earth (2035 A.D.) where robots are common assistants and workers for their human owners, this is the story of "robotophobic" Chicago Police Detective Del Spooner's (Smith) investigation into the murder of Dr. Miles Hogenmiller, who works at U.S. Robotics (run by Greenwood), in which a robot, Sonny (Tudyk), appears to be implicated, even though that would mean the robot had violated the Laws of Robotics, which is apparently impossible. It seems impossible because.. if robots can break those laws, there's nothing to stop them from taking over the world...