Horror drama. Couple Martha and Tomas move to a remote village on the western Irish coast to set up a home and to try and overcome the premature death of their firstborn baby daughter. They soon meet Daisy, a local orphan girl who suffers from autism and is believed to be a fairy changeling by the village community. Convinced that the rumours are nothing but superstition, pregnant Martha decides to take Daisy in and look after her. But, as a strong bond develops between them, Daisy is involved in a series of strange occurrences.