human boxers are replaced by robots.
Charlie Kenton is a former boxer.
He tried to build a robot for use in a boxing match but he loses it in an arranged fight all time. Charlie and Max Trying to find a piece of the robot to repair an old robot. Max discovers "Atom", an obsolete but intact sparring robot designed to withstand severe damage. Atom is the winner
With their efforts, until atom becomes a winner in all match