The Stool Pigeon

Policeman Don Lee often works with informants but numerous too-close calls and failed missions cause him to see the world as one betrayal after another - then he meets Guy, and is given a new chance to change his views.

The Stool Pigeon is a 2010 crime thriller movie directed by Dante Lam, starring Nick Cheung, Kai-Chi Liu, Nicholas Tse. It holds an IMDb rating of 6.7/10 from 2,278 votes and runs 1h 53m.