It's DS Logan McRae's first day back on the job after a year off on the sick, and it couldn't get much worse. Three-year-old David Reid's body is discovered in a ditch: strangled, mutilated and a long time dead. And he's only the first. There's a serial killer stalking the Granite City, and the local media are baying for blood. Soon the dead are piling up in the morgue almost as fast as the snow on the streets, and Logan knows time is running out. More children are going missing. More are going to die.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

It's been 17 months since the Bloodsmith butchered his first victim, and Operation Maypole is still no nearer catching him. The media is whipping up a storm, and the top brass are demanding results, but the investigation is sinking fast. Now isn't the time to get distracted with other cases, but Detective Sergeant Lucy McVeigh doesn't have much choice. When Benedict Strachan was just 11, he hunted down and killed a homeless man. No one's ever figured out why Benedict did it, but now, after 16 years, he's back on the streets again.

From the outside, Glenfarach looks like a quaint, sleepy village, nestled in the heart of Cairngorms National Park, but things aren't what they seem. The place is thick with security cameras, and there's a strict nine o'clock curfew, because Glenfarach is the last safe haven for people who've served their sentences but can't be safely released into the general population. For Detective Constable Edward Reekie, this was supposed to be a simple delivery job—drive his new boss up to HMP Grampian and collect Marky Bishop, take him to Glenfarach, then head back home again.

The story opens with the apparently accidental drowning of a sixth form student in the Norfolk countryside. As a matter of routine, or so it seems, the case passes across the desk of Detective Sergeant Smith, recently returned to work after an internal investigation into another case that has led to tensions between officers at Kings Lake police headquarters. As an ex-DCI, Smith could have retired by now, and it is clear that some of his superiors wish that he would do so.