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?

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 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.

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. 

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 rushes to the scene of a house fire, she’s shocked to discover it’s claimed the lives of two teenage children and their parents. But this tragedy is not quite as it seems. Each body is marked by a gunshot wound, and the mother, Helen Daynes, is holding the gun. The case sparks painful childhood memories for Kim, who suffered at the hands of her own abusive mother, but it just makes her more determined to uncover the truth. As Kim untangles Helen’s past, she finds a history of clinical depression. But did it drive Helen to murder her loved ones? 

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. 

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? 

When Detective Kim Stone is called to a local business, what she sees leaves her speechless. The photo on the driving license bears little resemblance to the man laid out before her, and she knows she’s up against the most twisted killer she has ever encountered. But as she breaks the devastating news to the victim’s wife, Diane Phipps, Kim can’t help feeling that something isn’t quite right about the woman’s reaction. 

When a sadistic killer begins picking off victims on the streets of Inverness, Jack’s boss decides to bring in some outside help. But the new team member is an old flame from Jack’s past who isn’t quite ready to let him go. And as the dead bodies rack up, the happily ever after that Jack has been building for himself might just be the next victim to fall....

One August afternoon, eight-year-old Grace Lennard skips into the garden of the childcare center she attends and vanishes into thin air. Rushing to the scene of Grace’s disappearance, Detective Kim Stone finds a chilling piece of evidence: the engraved heart bracelet belonging to Melody Jones - the little girl who was taken from a playground exactly 25 years ago. Hours before, Steven Harte had walked into Halesowen police station and confessed to having information that would lead Kim to Melody. And he told Kim she’d have a more urgent problem to deal with first.