To prevent a gang war, a young Ohio investment advisor (Michael Rapaport) must impersonate a Mafia Godfather for a few weeks following the assassination of his crime-boss biological father (Robert Forster) whom he had not even known existed. He tries to keep this new life secret from his real family, especially from his very jealous fiancee (Christine Taylor), with the help of his new Cosa Nostra "family," especially his father's chief lieutenant (Christopher Walken).