Nancy Drew and her friends are plunged into a network of strange events when they visit Misty Lake. The Very night they arrive, they meet pretty, red-haired Cecily Curtis, who seeks Nancy's help in solving two mysteries: one concerning Cecily's fiance, Niko Van Dyke, a popular singer who believes his record company is cheating him of roaylty payments; the other, involving a family treasure hidden before the start of the Civil War- Cecily's only clue being half of a gold locket.
Nancy's investigations lead her to Pudding Stone Lodge, where the sinister Driscoll family lives. Elusive humming noises, a flashing light in the attic of the lodge, the periodic apparition of an excursion launch which had sunk in Misty Lake years ago, and the fleet- ing appearances of a frightened girl who strongly resembles Cecily give Nancy plenty of opportunity to test her sluething skills.
Braving a series of dangerous situations and discouraging developments, the alert young detective perseveres in her attempts to solve both mysteries and revel the astounding secrets of Pudding Stone Lodge.
This was taken from Clue of the Broken Locket