Hanna and Sophie leave Norfolk to go on holidays to Ireland. After the adventures of last summer, they are looking forward to a peaceful trip but danger is not far away. Drawn in to the world of the Si, they quickly find themselves at the centre of another battle between good and evil. With Kalan, the Hikey Sprite, can they help to defeat Carman and her three sons and restore order to Falias before it is too late?".