In a quiet village in Ireland, a mysterious local myth is about to change everything

One hundred years ago, Anna, a young farm girl, volunteers to help an intriguing American visitor 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 her very way of life.

In New York in the present day, Sarah Harper boards a plane bound for the West Coast of Ireland. 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.