Chien Fu (Jackie Chan) is a boy working as a janitor and gets abused by his teachers and fellow students without being able to fight back. One day he is taught a kungfu art called Snake's Fist by an unknown old beggar, since then he is not bullied anymore. He then mixes his current martial art with a technique that he watches how his cat kills a cobra to make into a new fighting style. Later, he uses this kungfu art to defeat The Eagle's Claw style of a man who threatens the old man who used to help him with Snake's Fist.