Undercover

After reverting from undercover police in the triad Ken (Shawn Yue) always feels that his colleagues all treat him with a bias. Ken prefers to take drugs to evade his pressure. Ah Fai (Sam Lee) the drug dealer is the only friend that Ken can pour out his unhappiness. In an incident Ah Fai had killed the police officer in order to protect his drugs with the presence of Ken. To avoid getting himself into any trouble Ken makes a big mistake to destroy all the evidence by burning out the car. But he forgets his most important witness (Ah Fai). However the result of continuously covering his mistake are pushing himself to convict an irreparable sin.