An Internal Revenue agent helps Phyllis locate a secret room in the Pruitt mansion, where they're soon awash in a tide of champagne, romance, and burglars.
Phyllis turns private eye to lift a curse from the house of Pruitt. Someone has stolen the family good-luck charms: the Rolls Royce hubcaps.
An audit by the Internal Revenue Service about overdue taxes reveals that the supposedly incredibly wealthy Pruitts family is in fact broke. Presumably causing the economic depression, an improbably charitable IRS allows them to continue living in their mansion and maintaining the pretensions of great wealth.