AMC Presents: A long-simmering hostility between the police and an Irish-American gang is primed to explode. The fuse is lit when a gangster infiltrates the police, and a cop goes undercover in the gang. In this crime-action tour de force, the South Boston state police force is waging war on Irish-American organized crime. Young undercover cop Billy Costigan is assigned to infiltrate the mob syndicate run by gangland chief Frank Costello. While Billy quickly gains Costello's confidence, Colin Sullivan, a hardened young criminal who has infiltrated the state police as an informer for the syndicate, is rising to a position of power in the Special Investigation Unit. Each man becomes deeply ... South Boston cop Billy Costigan goes under cover to infiltrate the organisation of gangland chief Frank Costello. As Billy gains the mobster's trust, … Two rookie Boston cops are sent deep undercover — one inside the gang of a charismatic Irish mob boss and the other double-crossing his own department.
