It was meant to be a harmless stag-night prank. But a few hours later, the groom has disappeared and his friends are dead. With only three days to the wedding, Roy Grace is contacted by the man’s distraught fiancée to unearth what happened on that fateful night. The one man who ought to know of the groom’s whereabouts is saying nothing. But then he has a lot more to gain than anyone realizes, for one man’s disaster is another man’s fortune.

When three young women are discovered strangled and mutilated in a Glasgow park, it is up to DCI Lorimer to find their killer. Frustrated by a lack of progress in the investigation, Lorimer is forced to enlist the services of Dr Solomon Brightman, psychologist and criminal profiler. Together they form an uneasy alliance. But when a homeless man is brought in for questioning, the investigation takes a bizarre turn.

During a vicious heat wave, a county maintenance worker stumbles upon two suspicious suitcases abandoned by the side of the road. Sheriff Bree Taggert responds to find two bodies stuffed inside the luggage. The press demands action. The community is on edge. Suddenly, Bree is at the center of a media firestorm. In Oregon, a senator’s daughter goes missing. FBI Special Agent Mercy Kilpatrick agrees to keep the politically sensitive case on the down-low.

A retired teacher is found dead in her Somerset home on a cold January night. At first glance, it is a routine unexplained death and a simple referral to the coroner, until a neighbour reports an unscheduled visit from an occupational therapist an hour before the body was discovered. Detective Chief Inspector Nick Dixon is convinced the elderly woman has been strangled—a cause of death confirmed by the pathologist—and a murder investigation is launched.

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?