A compulsive gambler in his younger days, Fred has been cured through psychiatric consultation--until paperboy Arnold tempts him with a bet. When the Flintstones' furniture begins to mysteriously disappear, Barney is dispatched to investigate Fred's marble games behind locked doors.

Wilma secretly empties Fred's closet of mementos for a rummage sale, including his old football uniform. But when Fred finds the goods in the Rubbles' car, where Wilma put them, he suspects Barney of being a thief.