Ai Him Yan Muk plot
Feng (Shawn Yue) is a former undercover police officer whose life quickly falls apart after carrying out his assignment. Feng and former triad brother Fai (Sam Lee) are caught using cocaine, and in the ensuing uproar, a police officer is killed, with Fai as the prime suspect. Fai runs away and no longer trusts Feng, who he sees as using him to get promoted in the police force. Feng sets out in search of Fai, which brings him into confrontation with his former triad. Meanwhile, a corpse is found that may be associated with both Feng and Fai.