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.