Chow is an undercover cop who must befriend former triad kingpin Chan Wai-Man to investigate a brutal diamond heist. It turns out that Chan is innocent of the theft, but not of the fencing of the stolen goods

This time taking on the rival Tung Sing triad, who is attempting to usurp Hung Hing influence in Hong Kong by having Tung Sing member Crow frame Ho Nam for the murder of Hung Hing Chairman Chiang Tin Sang. On the plus side, Chicken finds a new love interest in Wasabi, the daughter of the comedic priest, Father Lethal Weapon Lam.

An illegal immigrant from Mainland China sneaks into the corrupt British-colonized Hong Kong in 1963, transforming himself into a ruthless drug lord.