Ko Chow is an undercover cop who is under pressure from all sides. His boss, Inspector Lau, wants him to infiltrate a gang of ruthless jewel thieves; his girlfriend wants him to commit to marriage or she will leave Hong Kong with another lover; and he is being pursued by other cops who are unaware that he is a colleague. Chow would rather quit the force, feeling guilty about betraying gang members who have become his friends.
周潤發
as Ko Chow
Danny Lee Sau-Yin
as Fu / Tiger
孫越
as Inspector Liu Ting-Kuang
張耀揚
as Inspector John Chiao Chi
徐錦江
as Chan Kam-Wah
劉江
as Commissioner Chow
Fong Yau
as Chow Nam
Chan Chi-Fai
as Chen Ching / Tai Song
Cheng Mang-Ha
as Chow's Grandmother
黄柏文
as Detective Man
Chow Bo-Saan
as Mei / Rose
Victor Hon Kwan
as Piao / Bill
