Since Sandy Frederick first set foot on the volcanic Greek isle of Thera, this breathtaking place of ancient myth and mystery has haunted her dreams. Joining her estranged, obsessed father on a dive to find astonishing secrets from the ocean's floor, she cannot shake the feeling that she was meant to be here; that some ancient, inscrutable power is calling to her. But there are others who have been eagerly waiting for her arrival to drag her into a tangled and terrifying web of secrets, dark superstition, betrayal, blood, and death. And suddenly Sandy's heritage and her destiny could be her doom.