"The first time Jemma and Matt were invited to Polskirrin -- the palatial ocean-view home belonging to Matt's old friend Lucas Jarrett -- it was for an intimate wedding that ended in tragedy. Jemma will never forget the sight of the girl's pale, doll-like body bobbing listlessly toward the rocky shore. Now, exactly one year later, Jemma and her husband have reluctantly returned at Lucas's request to honor an anniversary they would do anything to forget....