Kathleen Poulson, a small-town librarian, never dreamed of becoming a crazy cat lady. But Owen and Hercules appeared in her house, and she realized that these were not mind games - her cats had real magical abilities. And when the corpse of kind old lady Agatha Shepard is discovered near Kathleen’s favorite cafe, Owen’s ability to become invisible and Hercules’ ability to pass through walls help the cats find the key to the solution. Someone's dark secrets are involved here, and you'll have to act secretly to get on the trail of a cold-blooded killer.