In the near future, boxing has been replaced by robot boxing, in which eight foot tall behemoths battle it out in the ring. For former World Title contender Charlie Kenton, this is very bad news indeed. Reduced to promoting robots cribbed together from scrap metal in seedy venues, he barely ekes out a living. When things become really bad, Charlie teams up with his estranged son Max to train a robot underdog who will, against all odds, give the pair a chance at a second chance.