Small-town librarian Kathleen Paulson often seems to gets mixed up in murder, but luckily, her very special cats always find a way to help her close a case …

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—who also happens to be a lookalike of a popular cabaret singer set to perform at the festival. Who could have wanted to harm this innocent girl? 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.