After losing his son in the crossfire of the battle between Iron Man and Dreadknight, Dr. Tenma, rebuilds him as a powerful humanoid robot with heartfelt emotions and hi-tech weaponry. But Tenma soon realizes that despite looking like him, he is not his son, and abandons him only for him to be found by a con man named Hamegg who puts him in an illegal fighting ring, where he fights all sorts of opponents. He is soon sought after by Dr. Elefun, an old colleague of Tenma’s, and Tony Stark, who train him in becoming a protector.
