Two decades have passed and crime kingpin Michael Corleone has nearly succeeded in keeping his promise that his family would one day be legit. A philanthropist devoted to public service, Michael is to receive a special award from the Pope for his good works. Determined to buy redemption, Michael and his lawyer B.J. are working on a complicated but legal deal to bail the Vatican out of looming financial troubles. However, trouble looms in the form...

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...