It’s Halloween, and Creepy Critter Keepers come face to face with a werewolf while trick-or-treating! At first, they’re scared of the creepy critter, but soon realize that it’s actually their new classmate, Will. Can they keep Will from turning into a wild animal every full moon? The Creepy Critter Keepers are on the case. But what happens if a werewolf doesn’t want to change his howl?