In South Boston, the Massachusetts State Police are waging a war on Irish-American organized crime. When it becomes clear to both the mob and the police that there are moles in their midst, the moles are suddenly thrust into danger. Afraid of being caught and exposed to the enemy, each must race to uncover the identity of the other man in time to save himself.

"Based on the motion picture Infernal affairs, directed by Andrew Lau Wai Keung/Alan Mak, screenplay by Alan Mak/Felix Chong." Originally released as a motion picture in 2006. Special features: 9 additional scenes with introductions from director Martin Scorsese; "The story of the Boston mob:" the real-life gangster behind Jack Nicholson's character; "Crossing criminal cultures:" how Little Italy's crime and violence influence Scorsese's work; theatrical trailer.