A weedy school janitor is constantly being beaten up, until a wise old kung fu master teaches him his secrets. The handyman is soon developing his own fighting style, and returns the favour by protecting his mentor from an evil clan that intends to wipe out all practitioners of his brand of martial arts. Action comedy, with Jackie Chan and Siu Tien Yuen. In Cantonese.

Everyone abuses and humiliates a downtrodden orphan until he befriends an old man, who turns out to be the last master of the snake fist fighting style. Jackie becomes the old man's student and finds himself in battle with the master of the eagle's claw style, who has vowed to destroy the snake fist clan.