On the night of a terrible storm, Oona is cut from her mother and welcomed with joy to the remote Irish island of Inis. Not far away, on a deserted beach, a woman pushes out a boy. Oona becomes drawn to wild Felim and his ousted mother, increasingly tangled in their erratic lives on the precipice of the island’s deeply Catholic and superstitious community. The gossips say that the mother and son are related to the fairies, and fear escalates when dark secrets are spun. As the magic of this strange boy grows, an extraordinary bond is created that will ricochet dangerously across Oona’s life. 36 years later, when her own daughter vanishes, Oona is forced to face the past she tried to escape in one last attempt to build a bridge between her and her lost child.