Cousin Wilma is peculiar; she is heavy and oafish, and when she comes to the Bridgeport family for a nice visit everything seems to go wrong. It begins with a clock that makes noise when it never had before. Then there are Mrs. Bridgeport's restless nights, Joan's school trouble, and Emily's fear of sleeping. It all seems to begin when Wilma arrives, but can she be the reason for all these strange happenings? The Bridgeport family will only find out WHEN MIDNIGHT COMES.