Normally, the arrival of an art exhibition at the Mayville Heights library would be cause for celebration. But thanks to the overbearing curator and high-tech security system that comes with it, Kathleen's life has been completely disrupted. Even Owen and Hercules have been affected, since their favorite human doesn't seem to have a spare moment to make their favorite fish crackers or listen to Barry Manilow.

But when Kathleen stops by the library late one night and finds the curator sprawled on the floor--and the exhibition's most valuable sketch missing--it's suddenly time to canvass a crime scene. Now Kathleen, her detective boyfriend Marcus, and her clever cats have to sniff out a murderous thief, before anyone else has a brush with death...