Tilly Baker thinks her family is weird. Her mother is eccentric. Her father dishes out disgusting punishments. Her brother is a lump of a boy who picks on her. What can an ordinary girl do about it? Well, she could use her unique abilities-that's what.The Bakers are off on holiday to the Seaview Caravan Park where a chance sighting spells trouble. Tilly and an unlikely ally are on the case, and the family have a series of amusing mishaps along the way.