Two men, famous for their 'Stone Fist' fighting style, join together to become masters, making themselves totally invincible. But when they quarrel and fight together, one of them has to die. Twenty years later the sons of these two men meet by chance, and Tong, the dead man's son, plans his revenge. His opponent however is an expert in 'Stone Fist', whereas Tong is only mediocre, and he is defeated each time they fight. Only when they discover each others real purpose, and that they both have the same enemies, do they join forces as their fathers did, to fight together in a final life or death battle.