There is one serial killer who has shaped and defined police profiler Tony Hill's life. One serial killer whose evil surpasses all others. One serial killer who has the power to chill him to the bone: Jacko Vance. And now Jacko is back in Tony's life. Even more twisted and cunning than ever before, he is focused on wreaking revenge on Tony - and DCI Carol Jordan - for the years he has spent in prison. Tony doesn't know when Jacko will strike, or where. All he knows is that Jacko will cause him to feel fear like he has never known before - and devastate his life in ways he cannot imagine.