When food for Thanksgiving starts disappearing from homes in River Heights, Nancy, Bess, and George investigate.

A search for stolen jewelry takes Nancy to New Orleans where she uncovers a swindling racket in which a medium uses her trade to relieve victims of their valuables.

While driving a motorboat around the Twin Lakes, Nancy and her friend Helen get caught in a dangerous storm. Luckily, they are rescued by another teenage girl in a rowboat. They soon learn that their rescuer is Laura Pendleton, whose mother has recently having passed away. Laura has come to meet up with her new guardians, but something isn't quite right about them. Nancy investigates the situation, and soon she stumbles upon a shocking surprise in...