DSI Stella Gibson is brought in to review the investigation into the murder of a woman in Belfast. As she travels across from London, we are introduced to the murderer himself: Paul Spector. Skilfully breaking into the darkened house of young solicitor Sarah Kay, Spector thrills himself by leaving his calling card in the form of Sarah’s underwear laid out on her bed. As Spector returns home, we see that far from the monster we have seen him to be earlier, at home he has two young children and a wife who loves him. Gibson arrives in Belfast and as she looks into the case, she finds similarities to a case from eighteen months ago. Believing them to be the work of one man, she sets about convincing Burns that there is a serial killer loose in Belfast. Meanwhile, that very serial killer is busy preparing for his next attack. It is only when PC Ferrington picks up on a lead that Gibson has identified, that the first signs that Sarah is in danger are noticed. But will Ferrington be able to reach Sarah before it is too late?
