When a visiting couple out on their yacht go missing from the Shetland oil capital of Brae, sailing skipper and amateur detective Cass Lynch is forced to ask her old adversary, DI Gavin Macrae, for help. His investigation brings to light surprising links to international art theft, and Macrae warns her to give this mystery a wide berth - but when one of her own sailing pupils disappears too, Cass can sit by no longer. As she sets out alone to explore a remote Neolithic tomb, Cass is unprepared for the secrets that lie buried there.

Previously published as The Trowie Mound Murders.