When a heat wave hits Chilson, Michigan, Minnie, Eddie, and their bookmobile head to the beach to catch some rays and some customers. Unfortunately, library business is put on hold when Minnie´s restaurant-owning best friend, Kristen, calls. The soup she served to patrons last night was deliberately poisoned and made some customers sick - and she needs Minnie´s help to sniff out the saboteur. Minnie and Eddie are hot on the tail of the suspect when an employee from a neighboring restaurant is found dead. Could the poisoning and the murder be related? It will take a feline to catch a felon.