Sarah Grayson and her rescue cat, Elvis, can always be found at a charming secondhand shop in the village of North Harbor, Maine. The duo often find themselves wrapped up in murder, but luckily they have help - a group of senior citizens runs an amateur detective agency called Charlotte's Angels. The Angels are hired to look into who is sabotaging cat shows, and decide the best way to do that is to send Elvis the cat undercover as a contestant. But then one of the cat show volunteers is murdered, and Sarah and the Angels have to catch a killer in two shakes of a cat's tail!