When Inspector Paws, a battle-scarred alley cat, narrowly escapes death by cougar, he moves in with Stella and Ernie Clayton, a couple in their late 50's, who have a home with a big yard to cater to his roaming instincts, good food, and no live-at-home kids to torment him. His newfound comfort is shattered by Ernie's fatal heart attack. Although Ernie's death is attributed to natural causes, the tingle in Inspector Paws' whiskers convinces him otherwise. Before he has a chance to figure out who killed Ernie and why, Stella and her zany friend Jo kidnap him and drag him off on a European bus tour, where he becomes the tour mascot and self-appointed sleuth. Can he solve the mystery of who killed Ernie? And if he does, will he be able to communicate who it is to these sensory-challenged humans before the killer kills again.