The new Kings Lake Central murder squad is about to spend its first morning on team-building exercises and reviewing cold cases when the call comes in that the body of one of the city's rough sleepers has been found in a shop doorway. It happens, someone says, he isn't the first to die on the streets and he won't be the last, but the story the new team begins to uncover is far from routine.  

When 14-year-old Zoe Johnson doesn't come home on a Monday night in early December, the alarm bells in Kings Lake Central police station do not ring straight away - after all, she's from the Dockmills, one of the toughest estates in the town. But for Detective Sergeant DC Smith, due to retire in just three weeks' time, there are some strange echoes of the case that has haunted him for the past 13 years. Maybe it's simply his over-developed sense of irony, or maybe, in his final days as a police officer, Smith must look once more into the eyes of a serial killer.

In North Devon, where the rivers Taw and Torridge converge and run into the sea, Detective Matthew Venn stands outside the church as his father's funeral takes place. The day Matthew turned his back on the strict evangelical community in which he grew up, he lost his family, too. Now he's back, not just to mourn his father at a distance, but to take charge of his first major case in the Two Rivers region; a complex place not quite as idyllic as tourists suppose.

Change is afoot at Kings Lake Central police station. A most unexpected new detective inspector takes up his post this Monday morning, and the oldest detective in the place takes a momentous decision. Around them, other officers are considering their own situations, and even the building itself seems to be facing an uncertain future. But life and death go on, nevertheless, and by lunchtime someone will make a grim discovery on the Norfolk saltmarshes. A stranger seems to have suffered a slow and agonizing death out there.

Two weeks of rest and recuperation - that's what the doctor ordered. Detective Sergeant DC Smith could listen to some music, make some of his own, and maybe even catch up on his reading; he is almost looking forward to it. And then there is a knock on the door. It's only his next-door neighbor, but it is the beginning of a sequence of events that will bring him face to face with some of the darkest episodes and the most dangerous people from his own past.

When a local man, a veteran of the war in Afghanistan, goes missing, his parents have good reason to be concerned. Emily Willows is a friend of the family and says that she knows just the person to find him - and, as Summer Lane soon points out, the fact that this also fits in with Emily's plan to set up her very own detective agency is surely just a fortuitous coincidence.

As a massive storm batters the Scottish coast, Gordon Smith’s home is falling into the sea. The trouble is: that’s where he’s been hiding the bodies. It’s too dangerous to go near the place, so there’s no way of knowing how many people he’s murdered. Or how many more he’ll kill before he’s caught. As more horrors are discovered, ex-detective Ash Henderson is done playing nice. He’s got a killer to catch, and God help anyone who gets in his way. 

Mark Randall lay dead in a field near Lowacre long before Smith had done what he had to do in Belfast. By the time he went back to work, the investigation was well underway. "It's not my case," he says more than once, and he really doesn't need it to be; he has enough to think about as it is. But going around the Norfolk countryside dotting the i's and crossing the t's, speaking to the local farmers and the Brothers of St. Francis from Abbeyfields, Smith begins to suspect that the investigation might be heading in entirely the wrong direction.

In the peace and tranquility of the woods at Pinehills on a Saturday afternoon, a mobile phone begins to ring. The phone belongs to DC Smith, and it isn't unusual that the call is from Kings Lake Central police station; what is unusual is the fact that he seems to be the subject of an investigation rather than taking part in one. What can the links be between a prisoner's violent death in another county, the disappearance of two teenagers, and the highest profile case in Kings Lake for many years?

"So I thought I might take up paragliding. You know, buy one on eBay and just jump off the cliff one morning." Emily Willows is middle-aged, widowed, wealthy, and bored. When she makes those flippant remarks to her son over coffee one Friday, she has no inkling that within a few hours she will be facing the most terrifying situation of her life.

When a worker goes missing from a North Sea gas platform, there seem to be just two possible explanations - it was a tragic accident or a suicide. It does not take Smith and his detectives long, however, to discover that James Bell led a double life back onshore in Kings Lake, a life complicated enough to make him at least one dangerous enemy. Before the case can be unraveled, Smith must get a new team working together.

Detective Sergeant Chris Waters got the call at 05.29 that July morning. This is it, said DCI Reeve, you'll be first there, it's all yours, you're the crime scene manager. Suddenly, after months of waiting and wondering, Waters finds himself in at the deep end, and alone at the scene of a puzzling murder. As the investigation proceeds, the detectives at Kings Lake Central find themselves visiting familiar places and talking to some familiar faces, while old enmities reappear in the incident room. Before this is over, Chris Waters will need to make a career-changing decision.

A large country mansion. A locked room. A gruesome murder. Russian oligarch Alexander Volkov has invited 1,000 guests to a party at his palatial Surrey residence, Westgrave Hall. But while giving a private tour of the library, a gunman kills Volkov, wounding his ex-wife and slaying her new beau. Nothing makes sense to DCI Craig Gillard. In the blood-spattered crime scene there are no forensic traces of anyone else involved, CCTV shows no one entered or left the library, and everyone seems to have an alibi.

The gruesome double-murder at an Eastvale property developer’s luxury home should be an open-and-shut case for Superintendent Alan Banks and his team of detectives. There’s a clear link to the notoriously vicious Albanian mafia, men who left the country suspiciously soon after the murder. When Banks and his team find a cache of spy-cam videos hidden in the house, the investigation pivots to another violent crime that could cast the murders in an entirely different light.

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.