The Stool Pigeon is 2010 Hong Kong action-crime film directed by Dante Lam and starring Nicholas Tse, Nick Cheung and Kwai Lun-mei. A sequel to 2008's Beast Stalker, Tse and Cheung's roles are reversed in this film. In the first film Tse played the cop and Cheung played the criminal, whereas in this film, Tse plays the criminal and Cheung plays the cop.
Inspector Don Lee (Nick Cheung) often works with informants but numerous too-close calls and failed missions cause him to see the world as one betrayal after another. Later, he meets Ghost (Nicholas Tse), and is given a new chance to change his views.