In the third installment of A Dog and His Girl Mysteries, things are going to the cats! Dodge and Cassie can't visit the senior center or take a walk without landing in a mystery or two. Something's up with the vitamins some people in town are taking--and something doesn't seem right about an eccentric neighbor's mysterious "fall" that leaves thirteen pets in need of homes. The former K-9 and his girl will leave no ladder unclimbed or rosebush uninvestigated to get to the bottom of the case!