The Stool Pigeon

In Hong Kong's gangster-run underworld, Inspector Don Lee (Nick Cheung) runs informants and has watched too many of them get caught. Then he recruits Ghost Jr. (Nicholas Tse), a street racer, to get close to a gangster named Barbarian, and the guilt Don carries follows the new man into the job. Dante Lam builds the film on what it costs to trade someone's safety for information.