A young detective is out for a jog on a snowy winter morning. Then she sees something terrible: a murder in the park, sudden and inexplicable. A woman has been killed by a passing hooded cyclist. It’s just DCI Craig Gillard’s luck that he’s on duty. The body is that of Tanvi Roy, one of the richest women in Britain and matriarch of a food empire. With a tangled web of family and business contacts and jealousies, Gillard’s job just got even more complex. As he delves deeper into the Roy family, it’s clear that everything is not as it seems.

Late on midsummer's night there is a splash in the river Thames. A body is found on an island, asphyxiated and laced with strange markings. For DCI Craig Gillard it's a baffling case. The victim's identity is elusive, clues are scarce and every witness has something to hide. Meanwhile one of Britain's deadliest serial killers is finally up for parole after a deal to reveal the location of two missing bodies. The felon has his own plans to get even with witnesses, accusers and the officer who caught him 30 years before. And who was that? A young trainee by the name of Gillard.

A body is found on a quiet lane in Exmoor, victim of a hit and run. He has no ID, no wallet, no phone, and - after being dragged along the road - no recognisable face. Meanwhile, fresh from his last case, DCI Craig Gillard is unexpectedly called away to Devon on family business. Gillard is soon embroiled when the car in question is traced to his aunt. As he delves deeper, a dark mystery reveals itself, haunted by family secrets, with repercussions Gillard could never have imagined. The past has never been deadlier.

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.

Promising architect Peter Young is shot dead at his desk. DCI Craig Gillard is on the scene, looking at what appears to be a brutal and highly professional hit: two bullets, fired with ice-cold calm. Gillard knows that the most crucial question in solving the crime is one word: why? Two weeks later, on the Lincolnshire coast, another body is found on a windswept beach. In this case there is no identity for the young man, just a curious brand burned into his neck....

Criminologist Martin Knight lives a gilded life and is a thorn in the side of the police. But then his wife, Liz, goes missing. There is no good explanation and no sign of Martin.... To make things worse, Liz is the ex-girlfriend of DCI Craig Gillard who is drawn into the investigation. Is it just a missing person or something worse? And what relevance do the events around the shocking Girl F case, so taken up by Knight, have to do with the present? The truth is darker than you could ever have imagined.

On the tree-lined banks of Surrey’s River Wey, a decaying corpse is dug up by workmen in the middle of an Anglo-Saxon burial site. His modern dental fillings show that this is no Dark Age corpse. DCI Craig Gillard is called in, but the body’s condition makes identification difficult. One man, however, seems to fit the bill: Ozzy Blanchard, a contractor employed by the same water firm doing the digging who disappeared six months ago. But then an X-ray of the corpse throws the investigation into turmoil. The deeper Gillard digs, the more shocking truths he will uncover.

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?

One moonlit night, the bodies of two young people are discovered lying entwined on a blanket in the woods. The young man is clutching a red rose. It appears to be a lovers' suicide pact.... Until Detective Nikki Galena and DS Joseph Easter look more closely. Romeo and Juliet, as they decide to call them, were murdered somewhere else and brought to the woods. But why? Then another young couple are found dead, again beautifully posed as lovers. 

"And see if there's any news about the missing girl." Life, as Smith used to say, is just one thing after another - as one investigation ends, a new one begins. But for reasons unknown to the rest of her team, DCI Cara Freeman will be haunted by the next case for the Kings Lake Central murder squad. They find themselves delving into the seamy side of life in the town, and one of their number will have departed before this new investigation is over. Perhaps Detective Sergeant Chris Waters should have seen it coming, but he has a lot more than work on his mind these days.

Revellers are flocking into Greenborough for the yearly Dark Greenborough Festival, a three-day event celebrating local folklore, superstition, and the darker side of life. What the public doesn't know is that there has been a warning sent to the police, saying that Greenborough will be a very dangerous place this year. The anonymous letter ends with the Latin phrase, Mors certa, hora incerta: Death is certain, the hour uncertain.  

DCI Oldroyd has seen his fair share of victims, but he has never witnessed a murder - until now. When world-famous violinist Hans Muller is shot and killed during a concert, the detective is faced with a case beyond logic. The culprit is nowhere to be found - and the victim’s priceless violin has disappeared too. As Oldroyd investigates the murderer’s identity and the motive for the killing, he enters the ruthless world of wealthy instrument collectors and stumbles upon a dark path where shocking secrets have been buried in the past. But the secrets will soon take centre stage.

A skeleton is found in a shallow grave in the churchyard. But this was not an official burial. The victim was murdered decades ago. At the same time, Detective Nikki Galena and her team are investigating the brutal slaying of local businesswoman Madeline Prospero. She was a member of an exclusive and secretive drinking club called The Briar Patch. But they've got no suspects and no one is telling them the truth. Meanwhile, the buried skeleton leads them on a trail to the village of Quintin Eaudyke. This is a troubled place. In the late 70s and 80s a reign of terror was unleashed.

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?

Charlie Hills, former desk sergeant at Kings Lake Central, is in trouble. He hasn't told Smith, his old friend and sparring partner, but someone has, and now the two former policemen are about to embark on a difficult and potentially dangerous search for the truth. For one of them, it could be life-changing.