Having to leave her beloved Ireland after her mum gets a new job, 10 year-old Hanna wonders how she will ever be able to fit in and start a new life in Norfolk. That is until she meets Sophie, a kindred spirit whose grandmother is full of local tales and folklore - especially those about the mischievous Hikey Sprite. While exploring the nearby woods, Hanna soon discovers that the quiet village of Langley is not quite what it seems. The friends meet a strange creature who enlists their help - help they must give if he and his kind are to survive the cruel and merciless Fomorian Giants. Hanna, Sophie and Gem the dog find themselves thrust into a magical world where the creatures of Norfolk mythology don't only exist in stories.