Westerley research facility is not for the faint-hearted. A "body farm" investigating human decomposition, its inhabitants are corpses in various states of decay. But when Detective Kim Stone and her team discover the fresh body of a young woman, it seems a killer has discovered the perfect cover to bury their crime. Then a second girl is attacked and left for dead, her body drugged and mouth filled with soil. It's clear to Stone and the team that a serial killer is at work - but just how many bodies will they uncover?

When a rapist is found mutilated in a brutal attack, Detective Kim Stone and her team are called in to bring a swift resolution. But, as more vengeful killings come to light, it soon becomes clear that there is someone far more sinister at work.

A victim killed with a single, precise stab to the heart appears at first glance to be a robbery gone wrong. A caring, upstanding social worker lost to a senseless act of violence. But for Detective Kim Stone, something doesn't add up. When a local drug addict is found murdered with an identical wound, Kim knows instinctively that she is dealing with the same killer. But with nothing to link the two victims except the cold, calculated nature of their death, this could be her most difficult case yet.

When a collection of human bones is unearthed during a routine archaeological dig, a Black Country field suddenly becomes a complex crime scene for Detective Kim Stone. As the bones are sorted, it becomes clear that the grave contains more than one victim. The bodies hint at unimaginable horror, bearing the markings of bullet holes and animal traps. Forced to work alongside Detective Travis, with whom she shares a troubled past, Kim begins to uncover a dark, secretive relationship between the families who own the land in which the bodies were found.

They thought they were safe. They were wrong. The murder of a young prostitute and a baby found abandoned on the same winter night signals the start of a disturbing investigation for Detective Kim Stone - one which brings her face to face with someone from her own horrific childhood. As more sex workers are murdered in quick succession, each death more violent than the last, Kim and her team realize that the initial killing was no one-off frenzied attack, but a twisted serial killer preying on the vulnerable.

When the body of a doctor is discovered brutally murdered in local woodland, Detective Kim Stone is shocked to discover the victim is Gordon Cordell - a man linked to a previous case she worked on involving the death of a young schoolgirl. Gordon has a chequered past, but who would want him dead? As the investigation gets underway, Gordon’s son is involved in a horrific car crash which leaves him fighting for his life. Kim's sure this was no accident.

Five figures gather 'round a shallow grave. They had all taken turns to dig. An adult-sized hole would have taken longer. An innocent life had been taken, but the pact had been made. Their secrets would be buried, bound in blood. Years later a headmistress is found brutally strangled, the first in a spate of gruesome murders that shock the Black Country.

On the fourth floor of Chaucer House, two teenagers are found chained to a radiator. The boy is dead but the girl is alive. For Detective Kim Stone every detail of the scene mirrors her own terrifying experience with her brother Mikey, when they lived in the same tower block 30 years ago. When the bodies of a middle-aged couple are discovered in a burnt-out car, Kim can’t ignore the chilling similarity to the deaths of Erica and Keith - the only loving parents Kim had ever known. 

In a busy shopping center, a little girl clutches a teddy bear, clinging to it in the absence of her mother, Katrina. Hours later, Katrina’s body is discovered in an abandoned building. For Detective Kim Stone, it looks like a quick, functional murder. But Kim’s instincts tell her there’s more to this senseless murder than meets the eye. What was the motive for killing a young mother out shopping with her child? 

Late one summer evening, Detective Kim Stone arrives at Haden Hill Park to the scene of a horrific crime: a woman in her 60s tied to a swing with barbed wire and an X carved into the back of her neck. The victim, Belinda Evans, was a retired college professor of child psychology. As Kim and her team search her home, they find an overnight bag packed and begin to unravel a complex relationship between Belinda and her sister Veronica. 

When Detective Kim Stone is called to the home of Samantha Brown, she finds the young woman lying in bed with her throat cut and a knife in her hand. With no sign of forced entry or struggle, Kim rules her death a tragic suicide. But a visit to Samantha’s parents rings alarm bells for Kim - there’s something they’re not telling her. And, when she spots a clue in a photograph, Kim realizes she’s made a huge mistake. Samantha didn’t take her own life, she was murdered. 

A victim? Or a killer? One icy cold morning, the remains of a woman are discovered. She has been abused, then butchered. DI Kelly Porter knows this is the work of a monster. One who has killed before - and will do so again. Kevin Flint is a young man with no friends and a reputation for being odd. He explores the hidden corners of the Lake District and likes to creep and watch. He witnesses depravity and it excites him. But will he cross the line from bystander to perpetrator?

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 25-year-old Beth Mullen returns home, expecting to find her twin Rachel waiting for her, the silent house sends a shiver down her spine. She races upstairs to find her beautiful beloved sister cold in her childhood bed, her sparkling blue eyes closed forever, the morning after attending a glittering party.... Newly engaged Detective Lottie Parker knows that Rachel has been murdered the minute she enters the bedroom. Rachel’s neck is bruised and a shard of glass placed in her throat. Confronted with such a horrifying killing, Lottie wastes no time in pursuing every clue. 

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.