When Shetland detective Jimmy Perez finds a body in a hut used by fishermen it seems to be a straightforward case of suicide. He recognizes the victim - a stranger with amnesia who had disrupted a local party the night before his death.
Yet this is no desperate act of anguish, but the work of a cold and calculating killer. As Perez investigates, he finds himself mired in the hidden secrets of the small Biddista community. Then another body is found.