9-year-old Tony Thompson (Jonathan Lipnicki) moves with his family to Scotland from California, where his family takes up residence in a small castle while his father is employed building a golf course on the estate of Lord McAshton. Since arriving in his new home Tony has experienced recurring nightmares about vampires and a mysterious comet. Things also don't get any better for him at school as he gets picked on by Lord McAshton's (John Wood (English actor)) grandsons Flint (Scott Fletcher) and Nigel (Iain De Caestecker).