After a near disaster, when the boat Nancy and her two friends were in gets caught in a horrible storm, a mystery unravels in a bungalow that they have found.
Nancy and her friends establish headquarters in a seaside yacht club to investigate strange happenings in a book store and the disappearance of a marble statue.
The original version - Nancy wins some land in Canada and problems develop when it is believed that there is gold on Nancy's property. Also a subplot about long-lost lovers.