Following up on his success with his 1978 smash hit Drunken Master, Jackie Chan directs this old school kung-fu-comedy. Lung (Chan) is an orphan being raised in a grim martial arts school run by a strict dour master. During the Lion Dance competition, Lung's buddy, Keung (Wei Pai), jumps ship and helps a rival school win. Keung is immediately kicked out of the school and Lung is sent out to go find him. Meanwhile, Keung falls in with a pair of thugs who are looking to bust the master of the rival school out of prison. The cops headed by the earnest Sam Kung (Shih Kien) mistakes Lung for Keung and eventually captures him. Though Lung easily manages to slip out of the cuffs and evade Kung, his daughter proves to be much harder to lose and a formidable kung-fu to boot.