DI Jan Talantire is called to a cottage in Ilfracombe, where the female occupant is found dead, impaled with a crucifix. The woman, who had been renting the house for a few months, is well known locally, but the documents at the house indicate her real name is Ruth Lyle. The name means nothing to the young PC who found her, DI Talantire knows this cannot be the body of Ruth Lyle.

When four unconnected serial killers simultaneously commit identical murders across four different US cities, FBI Special Agent Shannon Wallace faces an unprecedented threat—a cooperative of killers working in unison. Each homicide is witnessed by a survivor, and now these lucky ones need to decide how to tell their stories to the world. Their posts about the horrific murders create a media storm and a new term is soon coined for the killers: The Alliance.

An inmate at Tonsgrove prison is murdered in her cell, but no one is willing to talk to the police. DI Gareth Williams is receiving pressure from above to solve the case – and quickly. Then, a local seventeen-year-old girl vanishes from her home. The close-knit community is shaken and they each have a different theory. Gareth knows that time is of the essence. With two major cases being investigated at the same time, the Beaumaris force is stretched thin. Frustrated at the lack of progress Gareth’s colleague and fiancée, DI Laura Hart, decides to take action: going undercover at the prison.

A retired teacher is found dead in her Somerset home on a cold January night. At first glance, it is a routine unexplained death and a simple referral to the coroner, until a neighbour reports an unscheduled visit from an occupational therapist an hour before the body was discovered. Detective Chief Inspector Nick Dixon is convinced the elderly woman has been strangled—a cause of death confirmed by the pathologist—and a murder investigation is launched.

A family outing to Tattershall Castle comes to a chilling end when eleven-year-old Tommy Burton disappears without a trace in broad daylight. All that remains in his place is a small blue teddy bear. DS Karen Hart and her team are called in to investigate the unusual circumstances—but for DI Morgan the crime scene is eerily familiar.

When a body is discovered, bled dry on a beach, the sleepy seaside town of Weston-super-Mare wakes up to a nightmare. For Detective Inspector Louise Blackwell, recently transferred to the town she last saw as a child, it’s her first case on the job. The victim - Veronica Lloyd, an elderly volunteer at a local church - has puncture wounds to her hands. When a priest is found killed in a nearby church in a similarly grisly condition, it becomes clear that Blackwell is dealing with a righteous and bloody murderer. But the victims aren’t random.

It is six years since special agent Samuel Lynch left the FBI following the disappearance of his son, Daniel. Lynch believes an underground organisation known as The Railroad is responsible and has never stopped searching.

During a vicious heat wave, a county maintenance worker stumbles upon two suspicious suitcases abandoned by the side of the road. Sheriff Bree Taggert responds to find two bodies stuffed inside the luggage. The press demands action. The community is on edge. Suddenly, Bree is at the center of a media firestorm. In Oregon, a senator’s daughter goes missing. FBI Special Agent Mercy Kilpatrick agrees to keep the politically sensitive case on the down-low.

When Jenna Bernstein, disgraced wunderkind CEO of a controversial biotech company, is accused of murdering her former partner and lover, she turns to Seattle attorney Keera Duggan to defend her. Keera is more than a master chess player who brings her intuitive moves into court—she’s Jenna’s childhood friend. But considering their history, Keera knows that where Jenna goes, trouble follows.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

It’s the night shift worker who finds them. Huddled in a hospital store cupboard is elderly Edith Higgins. Knifed to death. Sitting behind her is Staff Nurse Lily Frampton, a scalpel clasped in her blood-soaked hand. No one can understand why this kind-hearted, dedicated nurse would brutally murder a frail patient she’s spent months caring for. That same day, mild-mannered schoolteacher Rod Black is found surrounded by the battered bodies of his pupils. Why would a well-respected teacher beat five schoolboys to death?

Flower shop owner Ellie McEwan is driving home late one frosty November night when a shadowy figure leaps into the road out of nowhere. Ellie swerves to avoid him — and slams head-on into the crash barrier. Days later, Ellie wakes up in hospital — and notices there’s something different. Everyone she looks at — the doctor, the nurse, her friend Carole — is surrounded by a coloured aura. Her near-death experience seems to have given her a new ability. And now Ellie must use her new-found gift to catch a killer.

Detective Sam Helsdown hasn’t seen his daughter Zoe in two years and he’s excited and more than a little nervous to be at the airport picking her up for a visit. She’s 10 years old and has flown on her own for the first time. Flight BA631 from Athens has already landed and soon a trickle of people begins entering Arrivals. Among them is a little girl who runs towards him, head down, and throws herself into his arms saying ‘Daddy!’. But then he looks at her properly. This is not Zoe. This is not his daughter.

A body is discovered deep in a cave beneath the Yorkshire Dales. Leading the investigation into the mysterious death are experienced DCI Jim Oldroyd and his partner DS Carter, a newcomer from London. The deceased is Dave Atkins, well known throughout the village but not well liked. While there is no shortage of suspects, the details of the crime leave Oldroyd and Carter stumped. 

It was Beth Katz’s serial killer father who made her like she is: a successful FBI agent and an unstoppable vigilante dedicated to hunting down murderers who have evaded capture. Beth will push herself to the limits to deliver justice. Even if it means killing those who deserve to die.