The story mainly concerns Wuwechimatao, and how he came to found Karate. Humiliated by that most essential staple of HK cinema, the overacting bad-attitude loudmouth American arse-kicker, Wuwechimatao hops on a boat to China to learn the fabled Dog Fist. But he gets on the wrong boat, finding himself among pirates bent on kidnap and plunder. He foils the pirates' plan (to capture village children for ransom) and befriends an excessively cute kid, who just happens to be the sister of Cui Gu, champion of Dog Fist. After much crawling under legs, Cui agrees to teach Wuwech. There follows lots of cultural comparison, some very funny and warm scenes between the little girl and Wuwech, oodles of swordplay and fu fighting, leading up to an outstanding and very long climactic fight which starts in a mask festival, moves to the Shaolin temple and ends in a barn full of inflammables.