Kouji Kabuto is a normal teenager who has just inhereted the power to either be a God or a Devil--the power of the Great Iron Robot, Mazinger Z! But before Kouji can even choose what he will do with such power, the evil Dr. Hell appears on the stage to try and wrest control of the World with his own army of mechanical monsters! And all that stands in his way... Is Kouji Kabuto... And Mazinger Z!