Workaholic FBI agent Jake Cunningham fears his case against investment fraudster Scott Shift may not stick without the testimony of cocktail waitress Brandi O'Neill, who naively believed to be more then Scott's latest throwaway flirt. Jake is tricked by his ma to spend Christmas with his 'badly ill' dad, judge Joe Cunningham. Jake never visited his family in years, so he passes off Brandi as his steady date. She insists to stay, and like ma enjoys the posh - working class seasonal culture clash. Things get grim again when dad discovers Jake is undercover and sympathizes rather with the corrupt Shift family's lawyer Stanley.