The young woman standing on Lottie's step was a stranger. She was clutching the hand of a young boy. "Help me," she said to Lottie. "Please help me." One Monday morning, the body of a young pregnant woman is found. The same day, a mother and her son visit the house of Detective Lottie Parker, begging for help to find a lost friend.

1960. Thirteen-year-old, Rebecca, and her mother, live in fear of Rebecca's father's violent temper. As a storm batters Seaview Cottage one night, Rebecca hears a visitor at the door and an argument ensues. By the time the police arrive, the visitor has fled and both Rebecca's parents are dead. No one believes Rebecca's story that she heard a stranger downstairs.

As funeral mourners stand in silence at Ragmullin cemetery, a deafening cry cuts through the air. Lying crumpled at the bottom of an open grave is the bloodied body of a young woman, and Detective Lottie Parker is called in to investigate. Knowing the body can’t have been there long, Lottie wonders if it could be Elizabeth Bryne, a young woman who vanished without trace just days earlier. And with a new boss who seems to have it in for her, Lottie is under pressure to solve both cases quickly.

One hot summer evening, 11-year-old Mikey Driscoll is on the way home from playing with friends. Two days later, his body is discovered on a bed of wildflowers by some local teenagers. The case is assigned to Detective Lottie Parker, and this time it’s personal. The victim was a close friend of her son, Sean, from the run-down Munbally estate on the other side of town. Sean tells his mother Mikey was behaving normally before he died, but Lottie can’t help but feel that her son is keeping something from her.

When Amy Whyte and Penny Brogan leave a nightclub in the early hours of Sunday morning and don’t arrive home, their families are beside themselves with worry. Conor Dowling has just been released from prison, a man full of hatred for Amy, the girl who put him behind bars in the first place. The case is given to Detective Lottie Parker when the girls’ blood-soaked bodies are found, days later, in a derelict squat. Chillingly, both girls are clutching silver coins in their hands - what message is this killer leaving behind? All the signs point to Conor, but his alibi is watertight.

When Faye Baker discovers a fragile child’s skull behind the walls of her new home, Detective Lottie Parker is called to investigate. The house has been owned for years by the family of Faye’s boyfriend Jeff, so when Jeff starts acting suspiciously, Lottie wonders what he might be hiding....Lottie doesn’t have long to dig deeper before a child’s bones are found by 11-year-old Gavin on nearby railway tracks. The bones don’t match the small skull behind the walls, but Lottie can’t ignore the coincidence. 

Deep in the muddy fields of the Lincolnshire Fens, a teenage girl is found wandering, delirious, claiming to have been drugged at a party. Metres away, the drowned body of another girl is found on an isolated beach. And all this on a small stretch of land where, nearly 10 years ago, the shocking disappearance of a young girl remains an open case.

On a remote Highland mountain, the body of Elaine Buxton is burning. All that will be left to identify the respected lawyer are her teeth and a fragment of clothing. In the concealed back room of a house in Edinburgh, the real Elaine Buxton screams into the darkness…. Detective Inspector Luc Callanach has barely set foot in his new office when Elaine’s missing persons case is escalated to a murder investigation. Having left behind a promising career at Interpol, he’s eager to prove himself to his new team.

One dark winter’s morning, bride-to-be Cara Dunne is found hanging in her home, dressed in her wedding dress, with a lock of hair removed. Detective Lottie Parker is first on the scene. Looking at Cara’s bruised and battered body, she wonders who could have hated her enough to kill her at the happiest time of her life. The case takes a darker turn that afternoon with another shocking discovery - the broken body of a second young woman, pushed from the roof of the hospital where she worked. Fiona Heffernan was also due to be married....

Crimebusting duo DI Jackman and DS Evans are back, solving another crime that will make your skin crawl. Twenty years ago: a farmer and his wife are cut to pieces by a ruthless serial killer. Now: a woman is viciously stabbed to death in the upmarket kitchen of her beautiful house on the edge of the marshes. Then a man called Daniel Kinder walks into Saltern police station and confesses to the murder. But DI Rowan Jackman and DS Marie Evans of the Fenland Constabulary soon discover that there is a lot more to Daniel than meets the eye.

A crime wave has hit town. The target is a highly sought-after brand of streetwear called Hybird X, clothing that costs a fortune and resells for unbelievable prices. Houses are burgled, kids mugged on the streets...and finally a young man dies, all for the sake of his shoes. Then another boy’s body is found in a pile of rubbish. Meanwhile illegal steroids are flooding the streets. And there are dark movements on the marshes. 

Jackman’s sister-in-law Sarah disappears to London and throws herself into the river. What drove her to this? She was a woman with a seemingly happy home life and two beloved sons. DI Jackman and DI Evans dig into Sarah’s life. And Jackman realises he knew almost nothing about his sister-in-law’s past. Then, they discover a woman in a neighbouring village died in similar circumstances. What is the connection to a convicted murderer whose family are convinced he is innocent? Who is really pulling the strings?

When a young boy discovers the body of a woman beneath a thick sheet of ice in a South London park, Detective Erika Foster is called in to lead the murder investigation. The victim, a beautiful young socialite, appeared to have the perfect life. Yet when Erika begins to dig deeper, she starts to connect the dots between the murder and the killings of three prostitutes, all found strangled, hands bound, and dumped in water around London.

Stephen Berry is about to jump off a bridge until suicide prevention counsellor Damien Maclure stops him. One week later, Stephen Berry is found dead at the bottom of a cliff. But did he take his own life...or was he pushed? A spate of murders sweeps across Edinburgh, and to make matters worse for DI Luc Callanach and DCI Ava Turner, the victims seem random and entirely unconnected. With no clear method for how the killer chooses their victims, Callanach and Turner are under more pressure than ever to identify the killer before it’s too late.

In the midst of a rock festival, a charity worker is sliced across the stomach. He dies minutes later. In a crowd of thousands, no one saw his attacker. The following week, the body of a primary school teacher is found in a Dumpster in an Edinburgh alley, strangled with her own woolen scarf. DI Ava Turner and DI Luc Callanach have no motive and no leads - until around the city, graffitied on buildings, words appear describing each victim.