Doji travels the universe with his sister Shizuka and Pon, an alien from the Da Vinci star. Normally, he is a good-natured drunkard, but in reality he is a legendary super-soldier, Shuten Hoshibito. When Doji's heart, which does not tolerate evil, rages with righteous anger, he releases the power he had been suppressing through his drunkenness! However, when his power exceeds 15 minutes, it goes out of control, turning him into a mad demon...a double-edged sword.