Spring has come to Mayville Heights, and with it, some Hollywood glamour. The town is abuzz because a season of American Bake-Off is filming there. Librarian Kathleen Paulson is working as an historical advisor for the show, local restaurants are providing catering, and Kathleen's cats, Hercules and Owen, are hoping there is a cat treat challenge. But then Kathleen finds one of the contestants dead on set. She has solved many-a-murder with help from her supernaturally gifted cats, and with the whole town on tenterhooks, the talented trio will have to have all paws on deck to catch a killer.