When DI Barton is asked to investigate a seemingly innocuous fire that kills, he believes it's either children fooling around or a worrying racially motivated crime. As he delves deeper into the case, he soon realises that there is a history of similar blazes spread out over many years, all within a close area. An idea suggested by pathologist Mortis makes Barton suspect he has the arsonist’s motives wrong.

Twelve years ago, Noah Palmer went for a bike ride and never came home. His body was found in the Box Hill woods, a five-pointed star carved in his chest. He is the fourth victim of a serial killer who has never been caught. Now, a young woman is involved in a shooting outside Harrods in central London. Her DNA shows a familial match to the Box Hill cold case. Detective Rob Miller leads the investigation. To solve this mystery, Rob’s going to have to go off-book, potentially putting his career—and already complicated love life—on the line.

When the manager of a residential home for adults with learning difficulties is found dead in the freezer, the police investigation must tread carefully. Many of the residents are vulnerable. But could one of them be the killer? Detective Inspector Winter Meadows leads the inquiry. He begins to uncover some irregularities: in the finances, in the standards of care and with the account of events that staff and residents give to the police. The neighbours of the care home are troubled with all the goings-on. 

When Natalie Benyon’s 18-month-old daughter, Ella, disappears from a housing estate, the police and local community act quickly to organise a search. Given the age of the child, once the local area is scoured, DI Winter Meadows draws the frightening conclusion that Ella has been abducted. The attention of the police focuses on the family itself: the lifestyle of the mother, the boyfriend, the raucous party they had the night before Ella’s disappearance.

One morning Gwen Thomas takes a short walk with her Siberian husky in the outskirts of the Welsh town she calls home. She is drawn to a desolate area where, some 20 years ago as a teenager, she was brutally attacked and her friend killed. Disorientated by a sudden rush of memories, she has a fall. Later, recovering in hospital, she begins to recollect the events that led up to her friend’s death.  

When the chief suspect in the notorious "peekaboo cop killer" case blew himself up, almost taking lead investigator DCI  Duncan Bone with him, the psychologically damaged detective thought his days on the force were over. But, when another PC is abducted and murdered in the same deranged peekaboo fashion, Bone is persuaded to return to lead the new investigation.

As the first anniversary of the formation of the Kings Lake murder squad approaches, there is a problem—they've run out of murders. As a result, they are given the task of reviewing unsolved cold cases. One of these comes back to life in unexpected ways as the team try to discover the identity of the young woman whose body was found in the Norfolk countryside two decades ago. And even if they can give her a name, how can they possibly find her killer after so many years?

Young Tom French was found dead, lying in a marsh on the Norfolk coast, with his head bashed in and his binoculars still around his neck. One of the best birders in England, Tom had put the village of Rushy on the birdwatching map. Everyone liked him. Or did they? George Palmer-Jones, an elderly birdwatcher who decided quietly to look into the brutal crime, discovered mixed feelings aplenty. Still, he remained baffled by a deed that could have been motivated by thwarted love, pure envy, or something else altogether.

DI Alan Williams is faced with the most brutal murder scene he's witnessed: the ritual killing of an elderly widow. Evidence at the scene indicates that the murderer is close, and the investigation runs at breakneck speed in the hunt to stop them from striking again. Meanwhile, the busy port of Holyhead is being used by unscrupulous traffickers, who are embroiled in a violent turf war. With resources stretched, DI Williams is facing a case that could break him.

Meet DCI Lesley Clarke. She’s a straight-talking city copper who doesn’t suffer fools gladly…and she’s been transferred to rural Dorset. After being injured in a bomb attack, Lesley is presented with a choice - early retirement, or a period of respite in a calmer location. But things don’t stay calm for long. Before she’s even started her new job, Lesley is dragged into investigating a murder at one of England’s most iconic landmarks, the imposing Corfe Castle.