Ronald Cheng plays a low-level Triad who is spotted by a trio of cops, who think he is really a undercover officer who has lost his memory.

Fat (Ronald Cheng) is a loser in work, and even in the triad gang. Ordered by another gangster (Timmy Hung), Fat attempts to assassinate the leader of the opposite gang. His mission, undoubtedly, ends in a fiasco. Yet this failed attempt hooks him up with his former puppy love (Pace Wu), who is now the wife of mysterious gangster Wind. Meanwhile, when Fat is working at a cyber cafe with his buddy Chu (Lam Tze Chung), three young and hot policewomen arrive and think that Fat is a missing undercover cop who suffers from amnesia.