Living in the guilt of sacrificing his informant in a previous operation, Criminal Intelligence Inspector Don Lee is wary when his superior orders him to send another informant to spy on the criminal operations of Barbarian, a vicious gangster plotting a jewelry heist. He seeks ex-convict Ghost, who agrees to work for Don despite vowing to go straight since he's desperately in need of money to repay a debt and save his sister. Ghost's driving skills help him infiltrate Barbarian's gang and earn his trust, but by feeding information to Don and hooking up with Barbarian's girlfriend Dee, Ghost is pushing himself into a tight and deadly corner...
The Stool Pigeon is a 2010 action thriller film directed by Dante Lam and starring Nicholas Tse, Nick Cheung and Gwei Lun-mei. A Hong Kong-Chinese co-production, the film is about police detective, Don Lee (Cheung), who uses informants to gain information about gangsters. Lee begins to feel guilty when his informants are caught, but sends out a street racer named Ghost (Tse) as an informant to gain information about a gangster name Barbarian.