When Great-Uncle Horace brings back lost and homeless animals from his travels around the globe, it falls to Zoe, and her mum, the zoo vet, to settle them into their new home. She's good at this, because she can understand what they say and talk to them, too. But that's a secret. A little wolf pup has arrived at the zoo, just in time for Halloween. He won't stop howling, and Zoe doesn't know if he's unhappy, or if it's something more spooky.