The body of a young girl lying face down in a swimming pool - white tennis shoes still on her feet, chestnut hair fanned out like a halo - is the last thing Detective Josie Quinn expects to find on an early morning visit to see her brother before class at Denton University. But when she recognizes the girl’s face as she drags her limp body from the water, there’s only one question racing through Josie’s mind: How does a champion swimmer accidentally drown? 

It’s winter in Black Rock Falls, and as tourists flock to the small town to take in the snowy mountain peaks, one visitor makes a sickening discovery. The frozen body of a young woman hangs from a tree on the outskirts of town. Detective Jenna Alton is called in to investigate. Jenna’s stomach turns as she surveys the ice-cold remains, and she’s soon alerted to similar burial sites nearby. With no missing persons reported, Jenna and her deputy, David Kane, fear Black Rock Falls is being used as a dumping ground for bodies. 

When the body of a young woman is found, tied to her bed and the victim of a brutal attack in her own home, Detective Morgan Brookes is sickened by what she finds as she searches the house, and unprepared for the nightmares it inspires about her childhood. When the DNA collected gives a positive ID, Morgan can’t wait to put the attacker behind bars. But the person it matches to is already in prison. How could the DNA of someone who has been locked up for over 20 years have shown up in Morgan’s crime scene? And then they make another close match - to Morgan herself.

When the remains of a brutally murdered young woman are left hanging from the Glenfinnan Monument in the Highlands of Scotland, DCI Jack Logan and his Major Investigations team are dispatched to investigate. At first, the case appears to be fairly open and shut. But, as evidence mounts, Jack uncovers some shocking truths about the victim that risk turning the investigation into a potentially explosive international incident.

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?

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? 

Following a frantic emergency call in the middle of the night, Detective Jenna Alton arrives at a secluded family home to find the body of Lucas Robinson lying in a pool of his own blood in his bed. His wife Carol, shivering in shock, has just watched an intruder shoot her husband in cold blood. As Jenna investigates the murder, she soon discovers that Lucas was having an affair. And when his mistress is also found strangled to death in the center of the small town, Jenna is convinced that the murderer is living amongst them.

Fifteen-year-old Lindy Rosen has been having nightmares for weeks, waking in a panic, screaming that there’s a man in her room watching her sleep. Her parents assumed it was her overactive imagination, but when one morning they find Lindy missing from her bedroom, they’re not so sure. Detective Jenna Alton is called in to investigate. Within hours of the schoolgirl going missing, the kidnapper reaches out to Jenna with a video of Lindy bound and tied to a chair, crying to be set free. And a simple message - you’ve got 24 hours to find her or I kill her. 

It’s hiking season in Black Rock Falls, and the small town in Montana is flooded with visitors. But when a hiker finds a human skull on a deserted trail in the woods that surround the town, Detective Jenna Alton is called in to investigate. With no missing persons reported, Jenna has no leads. Then her team makes a shocking discovery - the body of another hiker, a young man, tied to a tree and riddled with bullets. Could the two murders be linked? As more bodies are found, Jenna and her deputy David Kane know that they must venture deep into the forest to find and face the killer.

Following a piece of old rope, the girls find a large mound of freshly laid earth, undisturbed in the darkness of the trees. Clawing at the ground beneath them, they make contact with something solid. When they realize what they’ve discovered, the silence is broken by their piercing screams as they stare down at the shallow grave. Without looking back, they run as fast as they can, failing to spot the person nearby watching their every move….

When a killer starts murdering lawyers in a prestigious law firm, and every lead takes them to a dead end, Detective Chief Inspector Whitney Walker finds herself grappling for a motive. What links these deaths, and why use a lethal injection? Alongside forensic psychologist, Dr. Georgina Cavendish, they close in on the killer, while all the while trying to not let their personal lives get in the way of the investigation.

When the body of a woman is found hanging from a tree in her front garden, rookie Detective Morgan Brookes is first on the scene. But Olivia Potter is past saving. And when her husband and daughters cannot be traced, Morgan knows there is more to this tragedy. And then she finds them. Lying huddled together in the dark basement, each of their faces covered with a small cotton cloth, their bodies cold to the touch. But as Morgan kneels beside the family, she realizes that one of the girls is still breathing.

When a murderer leaves a familiar pink scarf as his calling card, Detective Chief Inspector Whitney Walker is forced to dig into a cold case, not sure if she's looking for a killer or a copycat. With a growing pile of bodies, and no clues, she turns to forensic psychologist Dr. Georgina Cavendish despite their relationship being at an all-time low. Can they overcome the bad blood between them to solve the unsolvable?

On a lonely stretch of coast at daybreak in North Carolina’s Outer Banks, Detective Casey White is shocked to find the drowned body of a much-loved local woman, Ann Choplin, her beautiful face covered with specks of sand. The green and white rope binding her wrists reveals the terrifying truth that this innocent mother’s death was no accident. 

The body of Amos Price lies in a pool of blood on the polished floor of an otherwise empty house. With no signs of a break in and no clues left at the scene, Detective Jenna Alton is at a loss. But as the team begins to unpick the life of the reclusive victim, they discover a disturbing link between Amos and the disappearance of several young girls in the county going back years.