Beth is excited for her twelfth birthday, when she will receive her great-grandmother's heirloom necklace as a gift, but when the necklace goes missing, Beth must learn the secrets of her manor house in order to clear the name of her maid and friend, Shannon.

Due to the Great Depression, money is tight for the Vandermeers until a wealthy benefactor starts purchasing family heirlooms, but questions are raised when they realize that this mysterious buyer has paid more for the items than they are worth.