Their parents came to Boston in search of the proverbial “American Dream.” But after witnessing the brutal shooting death of their father, brothers Sean (Baldwin) and Thomas Phelan (John Novak) grow up dreaming of vengeance - and pursuing it on opposite sides of the law. As Thomas builds a career and gains a foothold in the U.S. Attorney’s Office, Sean rises through the underworld ranks to become head of the Irish Mob. From rough, working-class streets to high-stakes backroom politics, amidst blind faith and bitter betrayal, loyalties are tested and lives are torn apart as the lines between the factions of law and organized crime begin to blur...and bleed.