Michael Ballhaus

In South Boston, the Massachusetts State Police are waging a war on Irish-American organized crime. Undercover cop Billy Costigan is assigned to infiltrate the mob syndicate, which is run by gangland chief Frank Costello. Billy quickly gains Costello's confidence. Colin Sullivan is a hardened young criminal who has infiltrated the police department as an informer for the syndicate. Colin is rising to a position of power within the Special Investigation...

In 1846, waves of Irish immigrants poured into the New York neighborhood of Five Points. "Billy the Butcher" bands his fellow "Native Americans" into a gang to take on the Irish gang "The Dead Rabbits," organized by Priest Vallon. After an bloody clash Vallon is dead and his son ends up in a brutal reform school. In 1862, that boy returns to seek vengeance against the man that killed his father.