The story revolves around the Size-To Bo who is a famous pugilist Judo. When he is at peak of his career, he suddenly quit to switch as an indulgent boss of a pub. Meanwhile, Tony, who is a judo champion has heard about the reputations Sze-To Bo, so he come to Sze-To Bo to fight a battle. Not only that, the enemy of Sze-To Bo also come to fight an unfinished battle long ago with him. Sze-To Bos teacher is also weak, his incompetent son want to rely on Sze-To Bo to reorganize and fame the dojo. What should he do to solve these troubles?