1946: A boatload of men are shipwrecked within sight of their homes on the remote Scottish island of Kulah, the wailing of the women could be heard across the sea on neighbouring Battersay. But the women are also hiding a secret...Journalist Ally Niven escapes to the Scottish island of Battersay looking for a quiet life, only to find from the outset someone is trying to scare her off. Tensions are high as people protect and harbour "Birdwoman" - a feral young woman found on the rocky shores of Kulah. Ally sets out to discover the truth and the two stories merge in a shocking climax.