When Joe's teacher announces the new class project will be all about their pets, Joe turns glum there's no animals allowed in his house. So when he starts to invent a pet, his imagination turns wild and the dragonosaurus is born! There's lots of fun to be had with his new 'pet', but when Joe notices something amiss on the neighbouring farm the dragonosaurus is quickly abandoned. Perhaps an animal to call his own is closer than Joe thinks.