Stephen Chow beats a guy in a kung fu match. This makes Pak-Cheung Chan want to learn kung fu from him, rather than his aunt, Josephine Siao, who defeats Chow's opponent's brother and his goons in the street; she's wearing black,so he doesn't recognize him. Chow wants to learn kung fu from her, but she claims to not know any. Meanwhile, Chow's girlfriend walks out on him while...
Oh, I'm not sure what is going on. It's a travesty of kung fu movies, including a sequence in which Miss Siao trains Chow by telling him a story about a distant ancestor and electrocuting him repeatedly. I'm sure there are plenty of jokes that aren't translated, but the physical comedy is all there, ending in the inevitable ring match between Chow and the principal villain. There also a very obvious strain of humor mocking the homoerotic tendencies of martial arts films. Even to a foreign devil like me, this is very funny, and makes sense in its own weird way.
Chow is great on the physical comedy, but Miss Siao's behavior is much funnier. She had been acting in films since the age of 5 in 1952. She retired from performing in the late 1990s, partially because of deafness, and partially to tend to her many charitable endeavors.