Thornwood Village, 1910. Anna, a young farm girl, volunteers to help an intriguing American visitor, Harold Griffin-Krauss, translate 'fairy stories' from Irish to English. But all is not as it seems and Anna soon finds herself at the heart of a mystery that threatens the future of her community and her very way of life. New York, 2010. Captivated by the land of myth, folklore and superstition, Sarah Harper boards a plane bound for the West Coast of Ireland and finds herself walking in the footsteps of Harold and Anna one hundred years later. But once there, she finds she has unearthed dark secrets - secrets that tread the line between the everyday and the otherworldly, the seen and the unseen.