A young woman, Ho Mei Fong, flees from a gang of criminals while carrying a valuable item in her purse. She dies in a taxi, but not before hiding the purse, drawing taxi driver Chien Chen into the mystery. His involvement is compounded by the arrival of Ho Mei's sister, a Hong Kong policewoman, as they work together to uncover the secrets of the missing purse and evade the criminals and their hired thugs, led by Jackie Chan.

Rumble in Hong Kong
When the owner of a valuable item, Ho Mei Fong, is murdered in a taxi cab driven by Chien Chen, he becomes embroiled in a complex crime network.