After being beaten by some thugs, police officer Chin Tai Ba (Leung Kar Yan) learns the Sleeping Fist style from martial arts master Chung Yiu (Yuen Siu Tin). After mastering his training, Chin sets out with his teacher and Cub (Wong Yat Lung) to get his revenge. But the bad guys have a secret weapon of their own, Eagle Claw master Kao (Kao Hsiung).

A plainclothes policeman, Chin Tai Ba (Leung Kar Yan), is seriously wounded in a fight with some ruffians but is helped to safety by a young wiseguy, Cub (Wong Yat Lung). Here he is taught the art of Sleeping Fist by Cub's master Chung Yiu (Simon Yuen Siu Tin), and the trio march to the Shang Wei martial arts school to take revenge on the thugs. However, in a last desperate attempt to get even, the gang call on Eagle Claw master Kao (Kao Hsiung).