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? 

Newly divorced and with his career in jeopardy, Detective Connor Parks takes solace in the arms of a beautiful woman he meets at a bar. The next morning, Claire Fletcher is gone, leaving nothing behind but an address and a decade-old mystery. The address leads to the Fletcher family home, where Claire's siblings inform Connor that their 15-year-old sister was abducted from a city street 10 years ago and is presumed dead.

Heavy rain pours on the small town of Denton causing the riverbanks to break and the body of a young girl to float quietly to the surface. With no crime scene to examine, the odds are against Detective Josie Quinn and her team. Mercifully, the victim’s body is perfectly preserved, right down to the baseball patch on the jacket she is wearing. Josie can’t hide her devastation - her dead ex-husband, Ray, owned one just like it.  

Detective Josie Quinn hasn’t heard from her sister since Trinity stormed out of the house in the heat of an argument three weeks ago. So, when human remains are found at the remote hunting cabin where Trinity was last seen, Josie can only assume the worst. Gathering her team, Josie feels a surge of relief when the dental records match a different body - that of a missing single mother from a neighboring town. But now Josie’s is not the only broken family desperate for answers.

After saving her three-year-old daughter from a car-jacking, off-duty police detective Jocelyn Rush ends up in the ER. The last person she expects to run into is Anita Grant, former prostitute and an old acquaintance from Jocelyn's days on patrol. In spite of her obvious injuries - mutilated hands and feet - Anita refuses to talk about what happened. Reluctantly, Jocelyn backs off, and Anita's case goes to Philadelphia's Special Victims Unit. Before long, Jocelyn is pulled into the SVU's investigation.

When a park ranger stumbles across the bodies of Valerie and Tyler Yates by a creek in the small town of Denton, Detective Josie Quinn is first on the scene. Still reeling from the news that her abusive mother is dying, Josie suspects this is more than just accidental poisoning, and she’s right: Someone jammed a crudely carved pendant necklace down Valerie’s throat before she died. Combing the area, Josie’s team discover a third sleeping bag indicating there could have been an extra guest around the fire that night. A lucky escape? A missing victim? Or a suspect on the run?

When seven-year-old Lucy Ross is snatched from the carousel in Denton city park, Detective Josie Quinn joins the frantic search. She’s the one who finds Lucy’s sparkly butterfly backpack abandoned by the ticket booth, a note with a devastating message stuffed inside: Answer your phone, or your sweet little darling will die.... The next day, Lucy’s parents are filled with hope when they pick up a call which they think is from their babysitter - but instead it’s a chilling male voice on the line.

FBI analyst Kassidy Bishop is assigned to the "'For You' Killer" task force after a series of sadistic murders bearing the same signature arise in different parts of the country. The homicides are both calculated and savage, occurring in different states, but bearing the same signature: the words "for you" scribbled at each crime scene. The case chills Kassidy, bringing back memories of her own encounter with a violent criminal five years earlier.

Watching her friend dragged away in handcuffs, Josie couldn't believe for one second that Gretchen had killed that poor boy. Confession or not, someone else was involved. She would find out who... When the body of a young student is found on the driveway of a local Denton home, a photograph pinned to his collar, Detective Josie Quinn is first on the scene. The house belongs to Gretchen Palmer, a dedicated member of Josie’s team, missing for the last 24 hours. Working around the clock, Josie is stopped in her tracks when Gretchen hands herself in to the police. 

Arriving with her partner Noah for dinner at his family’s immaculate countryside home, Detective Josie Quinn is devastated to find Noah’s mother, Colette, lying lifeless in the back garden, her mouth clogged with soil. Searching the house for answers, Josie’s team don’t know what to make of the rosary beads buried in the dirt near the body or the hidden file labelled “Drew Pratt”, the small town of Denton’s most famous missing person.

Detective Josie Quinn is horrified when she’s called to the house of a mother who had her newborn baby snatched from her arms. A woman caught fleeing the scene is Josie’s only lead, but when questioned it seems this mysterious girl doesn’t know who she is, where she’s from, or why she is so terrified.... Is she a witness, a suspect, or the next victim? As Josie digs deeper, a letter about a mix-up at a fertility clinic links the nameless girl and the missing child to a spate of killings across the county.

Detective Jenna Alton surveys the charred remains of the large suburban home, stopping to pause at the three lifeless bodies of the Woods family. Jenna knows she’s looking for a serial killer, but her priority is finding the missing teenage daughter last seen on the night of the inferno. Days later, Sophie Woods’s body is discovered floating in a shallow pool of crystal-clear water - known locally as Dead Man’s Drop - but Jenna still doesn’t know who would target the quiet family in such a brutal attack.

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

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.

When Ella Watson, a woman of wealth and status, is brutally stabbed to death in broad daylight, it sends a shockwave through the Lake District community. Later that day, Keira Bradley meets the same fate. But whereas Ella’s murder is a tragedy, Keira’s death on the notorious Beacon Estate is just another statistic in a dangerous place.