Shetland Detective Jimmy Perez knows it will be a difficult homecoming when he returns to the Fair Isles to introduce his fiancée, Fran, to his parents. When a woman's body is discovered at the renowned Fair Isles bird observatory, with feathers threaded through her hair, the islanders react with fear and anger. With no support from the mainland and only Fran to help him - Jimmy has to investigate the old-fashioned way. With no way off the island until the storms abate Jimmy knows he has to work quickly. There's a killer waiting for the opportunity to strike again...