[1][2][3] Ever since he was a child, Lee Chi-kin (Eric Tsang) has been determined to become a police officer, despite the fact that he comes from a family of criminals.

As an adult, he joins the police force, where he is first placed with the Narcotics Bureau.

He is later transferred, first to the Anti-Porno Bureau where he falls in love with a call girl, then to the Regional Crime Unit where he works under Inspector Chu (Natalis Chan).

Ng's father hires a killer, Thousand Faces Man (Michael Miu), to take revenge on Lee.

After several confrontations, Lee finally brings Thousand Faces Man to justice.