Four friends visited the island. But only three return. When Icelandic Detective Inspector Hulda Hermannsdóttir is sent to the isolated island of Elliðaey to investigate a disappearance she finds haunting similarities to a previous case - a young woman murdered ten years ago in the desolate Westfjords. Has a patient killer struck again? But 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?