Tom has the happiest family around. Dad is Senior Bogeyman for the entire east coast and Mum is First Assistant tooth Fairy. Only Uncle Gus feels a professional failure - he's just a garden gnome. But when the Most Powerful Witch in the World puts a bad-luck spell on tom, it's Uncle Gus - and tom's friend Mog (who's a . well, no one is quite sure what Mog is, but he's large and hairy) - who put things right.