Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

1989 film by Takeshi Kitano

A streetwise young man becomes a bodyguard to score quick cash. He befriends a disillusioned mercenary determined to begin life anew. They find themselves working together to foil an assassination attempt, but their partnership can't last.