In South Boston, the state police force 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 Unit....

"Seven-year-old Tim Templeton suddenly finds his share of parental love plummeting when his new baby brother arrives--wearing a suit and toting a briefcase--and makes it clear to everyone that he's in charge. But when Tim discovers that Boss Baby is on a secret mission, he reluctantly agrees to team up with his pint-sized sibling for an epic adventure that might just change the world!"--Container.