Summerview Secondary School is holding its annual charity auction. Margery and Clementine Butcher-Baker are on hand to prepare delicious baked goods for the big day with the assistance of Clementine's mysterious sister, Maria. As the auction begins, chaos erupts when Eleanor Black, the owner of Dewstow Museum, is found murdered in the stage storeroom. Maria has vanished. Her fingerprints cover the crime scene. Clementine refuses to believe her sister is capable of murder and is sure they need to widen the search. Eleanor has a long list of enemies. Old grudges resurface and hidden motives come to light. Only one thing is certain; Dewstow is a town full of secrets, and someone will kill to keep them.