He's your perfect date. You're his next victim. When the tortured body of a young woman is found in a dumpster, her eyes swollen shut and her clothes soaked with blood, detective Erika Foster is one of the first at the crime scene. The trouble is, this time it's not her case.

When a battered suitcase containing the dismembered body of a young man washes up on the shore of the river Thames, Detective Erika Foster is shocked. She's worked on some terrifying cases but never seen anything like this before. As Erika and her team set to work, she makes the link with another victim - the body of a young woman dumped in an identical suitcase two weeks ago. Erika quickly realizes she's on the trail of a serial killer who's already made their next move.

On a cold icy morning, a mother wakes to find her daughter’s blood-soaked body frozen to the road. Who would carry out such a horrific killing on the victim’s doorstep? Straight off her last harrowing case, Detective Erika Foster is feeling fragile but determined to lead the investigation. As she sets to work, she finds reports of assaults in the same quiet South London suburb where the woman was killed. One chilling detail links them to the murder victim - they were all attacked by a figure in black wearing a gas mask.

In the dead of a swelteringly hot summer's night, Detective Erika Foster is called to a murder scene. The victim, a doctor, is found suffocated in bed. His wrists are bound and his eyes bulging through a clear plastic bag tied tight over his head. A few days later, another victim is found dead in exactly the same circumstances. As Erika and her team start digging deeper, they discover a calculated serial killer - stalking their victims before choosing the right moment to strike.

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.

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.

Kate Marshall was a promising young police detective when she caught the notorious Nine Elms serial killer. But her greatest victory suddenly turned into a nightmare. Traumatized, betrayed, and publicly vilified for the shocking circumstances surrounding the cannibal murder case, Kate could only watch as her career ended in scandal. Fifteen years after those catastrophic events, Kate is still haunted by the unquiet ghosts of her troubled past. Now a lecturer at a small coastal English university, she finally has a chance to face them.

When teenager Sadie Winter jumps from the roof of her school, her death is ruled as suicide - a final devastating act from a troubled girl. But then the broken body of a young boy is discovered at the same school and it’s clear to Detective Kim Stone that these deaths are not tragic accidents. As Kim and her team begin to unravel a dark web of secrets, one of the teachers could hold the key to the truth. Yet just as she is about to break her silence, she is found dead.

When silence falls, who will hear their cries? The body of a young girl is found dumped on the roadside on the outskirts of Edinburgh. When pathologists examine the remains, they make a gruesome discovery: the outline of a doll carved into the victim’s skin. DCI Ava Turner and DI Luc Callanach are struggling to find leads in the case until a doll made of skin is found nestled beside an abandoned baby. After another young woman is found butchered, Luc and Ava realise the babydoll killer is playing a horrifying game. And it’s only a matter of time before he strikes again.

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. 

When a woman's body is discovered in a cathedral and hours later a young man is found hanging from a tree outside his home, Detective Lottie Parker is called in to lead the investigation. Both bodies have the same distinctive tattoo clumsily inscribed on their legs. It's clear the pair are connected, but how? The trail leads Lottie to St Angela's, a former children's home, with a dark connection to her own family history. Suddenly the case just got personal.

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.

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 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.

Three years ago, Gabe saw his daughter taken. In the back of a rusty old car, covered in bumper stickers. He was driving behind the car. He watched her disappear. But no one believes him. Most people believe that his daughter and wife are dead. For a while, people believed that Gabe was responsible. Three years later and Gabe cannot give up hope. Even though he has given up everything else. His home, his job, his old life.