The charming Minnesota town of Mayville Heights is hosting a music festival, and the whole place is bustling with musicians and tourists. Kathleen is looking forward to taking in some fabulous performances—and her two cats, Owen and Hercules, are looking forward to taking in some fabulous sardine crackers. But then the trio stumbles across a dead body by the river. The victim is a close friend of a well-known cabaret singer set to perform at the festival—and the two happen to look incredibly alike. Who could have wanted to harm the dead woman? Was it a case of mistaken identity? As accusations abound and suspicions swirl, Kathleen, Hercules and Owen will put their abilities—both mundane and magical—to the test, and lay down the paw.