Ko Chow, a police undercover agent who is torn between his duty as a police officer and his loyalty to his friends on the wrong side of the law. He wants out and his commander officer Inspector Lau reluctantly approves his resignation but gives him his last assignment - supplying guns to a gang at criminals suspected of armed robbery. Tiger the head honcho of the gang of robbers. He has built a relationship with Ko Chow based on mutual trust and respect. During a shoot out with the police, Ko Chow must decide which side he is on.