Hamish McCorkle has a very odd family. His grandmother is half dragon, his father plays strange musical instruments, his mother is a yodelling tram conductor, and Hamish himself can talk to birds. When his Uncle Weaver (the black sheep of the family) pays a visit on Hamish's birthday, the family knows he's up to no good. But it's not until Hamish rescues his sister Eugenie from the clutches of Weaver and the amazing Eye Spy that the McCorkles realize exactly what Weaver's up to...