The first feline member of the Wise Dog Society, the Orphan, takes on his first cat-only investigation, searching through the sewer tunnels for a missing, long-thought-dead witch cat. Accompanied by a tough stray, the Getaway Kid, Orphan's trek into the wet, slime, and filth will bring him more trouble than his Wise Dog hocus-pocus can protect him from -- and even if he finds the witch who's been haunting his dreams, they'll all still have to escape alive from all the dark horrors that lurk underground . . .