As the investigation takes a shocking turn, secrets rise to the surface. When Andrew was living in Edinburgh, a strange turn of events brought him face to face with an acquaintance from his past, whose deeply corrosive influence will become clear. Meanwhile, the tragic recent history of Laura’s family helps explain the deep bond her and Katy share, as well as the lengths Laura will go to for those she loves. Will Laura’s past catch up with her, just as Andrew’s did?