Ko Chow is a undercover cop who is under some pressure from all sides. His manager, Inspector Lau, wants one to infiltrate a gang of jewel thieves that are ruthless. As a way to accomplish that he has to get some handguns. His girl friend wants him to devote to marriage or she will leave Hong Kong with another buff. And he's being chased by other cops that are oblivious he could be actually a colleague.What is significantly more Chow would prefer to quit the force. He feels guilty about needing to betray those who have been his pals, even though they do happen to be killers, drug dealers, loan sharks and protection racketeers:"I do my job, however I betray my buddies. "In addition to his problems, '' he begins to bond with Fu, a member of the gang.