Thomas and McGrowl have some interesting new neighbours. Cheerful Hiram Biddle and his young niece Binky have set up an obedience school for dogs. Soon, all the neighbourhood pups and pooches, including Thomas's own dynamic doggy, are attending.
But then Thomas and McGrowl's partner-in-adventure, Violet, becomes best buds with Binky - and Thomas feels really left out. When Thomas starts to suspect that Binky may not be as friendly as she appears, is he just jealous - or might he be onto a sinister plan? This tail-wagging thriller will have you guessing until the end!