Families are dying. No matter how hard DCI Platt tries, he's not seeing a pattern; not even after his own wife and daughter are targeted.

Young Melanie has forgotten what life outside Larksford House was like. She's been in for so long. But when Toby joins the team, she starts to remember. She really shouldn't be there. Professor Hicks is delighted that Toby has made the breakthrough for him. It might actually allow Hicks to improve his own fortunes.

Bill Brown sells security; his business improves with every strike of the family killer. As fear in the community grows, Bill's ability to gain a stranger's trust comes to the fore. But what is he hiding?

As the clock ticks, can Platt get closer to the killer, and will Melanie remember the truth?