Four friends visited the island. But only three returned… Detective Inspector Hulda Hermannsdottir is sent to the isolated island of Elliaey to investigate a disappearance. But she finds haunting similarities to an old case - the murder of a young woman ten years ago. Has a patient killer struck again? Hulda is soon caught in a web of deceit, convinced everyone is lying, even those closest to her. What secrets is the island hiding? And what price will she pay for uncovering the truth?