A man has been mutilated and left to drown on the incoming tide, handcuffed in his van. With the murder bearing a striking resemblance to a string of sadistic killings carried out with surgical precision in 1990s gangland Manchester, it can mean only one thing: the killer is back. Transferred to the Major Investigation Team, DI Nick Dixon is assigned a new partner and sent to Manchester. Meanwhile, the gruesome murders in Somerset continue.

Early on a cold Somerset morning, 10-year-old Alesha Daniels is reported missing by her father, a violent alcoholic. Her mother, a known drug addict, is found unconscious, but it’s her mother’s boyfriend the police are keen to trace. As the hunt for Alesha gathers pace, a second local girl is taken, plunging another family into the depths of despair. Cutting short his holiday, DI Nick Dixon races home to join the Major Investigation Team, but no sooner has he identified a network of local suspects than they begin to show up dead.

DI Nick Dixon is on the hunt for a vicious serial killer, following a trail of fingerprints and DNA across west Somerset. When the body of a young woman is found on the building site of a nuclear power station, work grinds to a halt. The body bears all the hallmarks of yet another random murder at the hands of the escaped killer. Then Dixon finds a motive. Fighting for his place on the Major Investigation Team, he soon uncovers a family’s desperate search for the truth, exposing a web of corruption and death that will shake the billion-pound construction project to its foundations.

In the early hours of Christmas Eve, the wife of parliamentary candidate Tom Perry is brutally murdered in an apparent burglary gone wrong. With the by-election campaign about to start in earnest and the festive season in full swing, torrential rain brings with it flood warnings on the Somerset Levels.

Isobel Swan, a sixth form student, has been murdered. First, her ring finger is severed, then her throat is cut. With the investigation going nowhere fast, Detective Inspector Nick Dixon is sent undercover as a trainee teacher into Isobel's boarding school.

A trainee jockey has been kicked to death by an aggressive stallion at the local stables. Deemed an accidental death, the case is closed. But when the jockey's brother returns from active service, he sparks an armed siege, demanding the investigation be re-opened and the truth uncovered. Still recovering from the physical and mental scars of his last case, Detective Inspector Nick Dixon is dragged deep into a murky world of betting scams and murder, where people will do anything to keep their secrets.

The discovery of a severed head in a golf course bunker triggers a frantic race to find a serial killer that brings the town of Burnham-on-Sea to a standstill.

A retired judge is shot dead outside the Dog and Gun inn in the remote Yorkshire village of Niddersgill. There's a witness who saw everything, and the gunman's on the run; the case should be open-and-shut for DCI Jim Oldroyd. But the murderer had no motive for wanting Sandy Fraser dead and, what's more, no trace of him can be found.

Rock climbers can't afford to make careless mistakes. But Detective Inspector Nick Dixon's former climbing partner, Jake Fayter, died doing just that. Or so it seems. Dixon suspects foul play, but his only leads are unreliable accounts of something odd happening in Cheddar Gorge seconds before Jake fell.

When a man’s body is discovered in a Swiss glacier thirty years after he went missing, his son, Foster Treherne, hopes he’ll finally have closure on what happened to the father he never met. But then the autopsy reveals signs of a struggle, and what was assumed to be a tragic accident suddenly looks more sinister. Foster tracks down his father’s old friends, but when he starts to ask questions it becomes clear that there’s something they don’t want to tell him.

In the quiet coastal town of Weston-super-Mare, a body is discovered at the foot of a cliff just months after a near-identical tragedy - and Detective Inspector Louise Blackwell can't believe it could be a coincidence. Next to the body, she discovers a note that echoes one found beside the first: Death is not the end. Louise is certain that behind these desperate acts someone is pulling the strings, but how many more will plunge to their demise before she can find out who - and why?

When a body is found on a lonely cliff top path, the angelic face of a murdered teenager lies facing the rising sun. Strangled by the hands of an unknown killer, it falls to DI Tom Janssen and his fledgling team to find out how she came to be there. Destined for a career in medicine, one to rival that of her parents, Holly Bettany’s future was as bright as it had been privileged. Seemingly, all that could threaten this promising teenager’s life was Holly herself.

After a long and eventful winter, DCI Ryan and his team are looking forward to the joys of spring. But, when one of their colleagues is shot dead on her own doorstep and the brass think it’s an inside job, Ryan finds himself drafted in to investigate. He’s barely scratched the surface when reports flood in of a terror explosion at Durham Cathedral. Chaos descends on the sleepy, historic city and, when the smoke clears, they find a priceless artefact that once belonged to Saint Cuthbert is missing.  

When a young man is found frozen to death on a Highland street in mid-December, DCI Jack Logan initially puts it down to a Christmas night out gone tragically wrong. But, when a postmortem reveals something more sinister, Jack discovers he is dealing with a cold, calculating killer with a long line of victims, a talent for torture, and a perverse sense of justice. 

When the mutilated remains of a woman are retrieved by local fishermen, it falls to DI Tom Janssen and his team to identify how she came to be in the water and what put her there. Joined on the case by his new permanent boss, DCI Tamara Greave, it remains to be proven if the woman's death was a result of foul play or a tragic accident.