The sisters at St. Malachi's convent are offered the use of a beach house on the Jersey Shore at the close of the school year. Everyone can use a vacation, and the nuns are no exception. What could possibly go wrong? With the Nosy Nuns—just about anything. Sister Gabriel's unquenchable sense of curiosity lead them into a dark adventure that puts even elderly Sister Agatha at risk. But in the end, and with Agatha's help, Gabby and M.J. shed light on a mystery on the beach.