It's the summer season in Chilson, Michigan, and the town is packed with merrymakers, ready for Fourth of July fireworks. Minnie and her rescue cat, Eddie, have spent a busy day on the bookmobile, delivering great reads to the library's patrons. But Minnie is still up for festivities, eager to show off her little town to her visiting niece, Katrina. But during the grand finale of the fireworks display, Katrina discovers a body. Minnie recognizes the victim as one of the bookmobile's most loyal customers. And she knows she - and Eddie - will have to get to the bottom of this purr-fect crime.