She’d been running for so long, it felt like her legs were on fire. Her heart was pounding so hard, she was sure it would give out. Around her, the snow was falling, casting an eerie silence over the town. A crack behind her, a foot snapping a branch, it warned her that he was still coming. She whipped around and saw the knife gleaming in his hand....

When Detective Madison Harper arrives at a remote summer camp in Shadow Falls, Northern California, her heart breaks for Jenny, the sweet little girl last seen splashing in the lake with her friends before she vanished. Peering into the silent cabins filled with rows of neatly made beds, Madison knows this idyllic place is hiding a terrible secret.

In the remote forests of Stillwater, Minnesota, you can scream for days and no one will hear you. So when the bodies of two 15-year-old girls are discovered frozen in the snow, Special Agent Nikki Hunt is sure the killer is local: Someone knew where to hide the girls and thought they would never be found. Though Nikki hasn’t been home in 20 years, she knows she must take over the case.

When small-town police officers discover the grave of a young boy, they’re quick to pin the crime on a convicted criminal who lives nearby. But when it comes to murder, Officer Susan Marlan never trusts a simple explanation, so she’s just getting started. Meanwhile, college professor Eric Evans hallucinates a young boy in overalls: a symptom of his schizophrenia - or so he thinks. But when more bodies turn up, Eric has more visions, and they mirror details of the murder case.

Elle Castillo once trained as a social worker, supporting young victims of violent crime. Now, she hosts a popular true crime podcast that focuses on cold cases of missing and abducted children. After four seasons of successfully solving these cases in Minnesota’s Twin Cities, Elle decides to tackle her white whale: The Countdown Killer. Twenty years ago, TCK was terrorizing the community, kidnapping and ritualistically murdering three girls over seven days, each a year younger than the last.

The beautiful young woman is perfectly still, curled up in the trunk of the car, her long dark hair hiding her face. Her cotton blouse has ridden up a little, revealing two small dots an inch apart on her back. Just like the others. Guilt has kept FBI Agent Tori Hunter away from her home in Manchester Bay, Minnesota for 20 years, ever since her twin sister disappeared on the Fourth of July, when the girls should have been together. But when she receives an anonymous newspaper clipping about another missing girl, Genevieve, Tori is dragged back to the past.

Three Chicago women have been found strangled, embalmed, and posed as if still alive. Doubting the findings of the local PD’s profiler, the FBI calls on forensic psychologist Zoe Bentley to investigate. Zoe quickly gets off on the wrong foot with her new partner, Special Agent Tatum Gray. Zoe’s a hunter, intense and focused; Tatum’s a smug maverick with little respect for the rules.

Escaping from a madman should have been the end of her nightmare. Instead it was only the beginning...Lizzy Gardner was just seventeen when she was kidnapped by the psychopath known as Spiderman, a serial killer terrorizing her California hometown. Imprisoned and tormented for months, Lizzy narrowly escaped with her life and Spiderman vanished without a trace. But if she thought he would forget her, she was dead wrong.

Fourteen years ago, Kaitlin Roe was the lone witness to the abduction of her cousin Gina. She still remembers that lonely Virginia road. She can still see the masked stranger and hear Gina’s screams. And she still suffers the guilt of running away in fear and resents being interrogated as a suspect in the immediate aftermath. Now Kaitlin has only one way to assuage the pain and nightmares—by interviewing everyone associated with the unsolved crime for a podcast that could finally bring closure to a case gone cold.

In the lonely woods around Grizzly Falls, Montana, the first body is discovered, stripped naked and tied to a tree. Alvarez and Pescoli have been hoping for a career-making case, but this is a nightmare. The killer stages car accidents on icy, isolated roads and “rescues” his victims. He toys with them, heals them, earns their trust...before subjecting them to a slow, agonizing death.

When secretary Annie Parkes is snatched from the street outside of her workplace, David Kane is tasked with finding her. Strong, highly skilled, and secretive, he’s a loner and an outsider; the only man the military trust to find Annie before her kidnappers make good on their promise to kill her. But as Kane pulls Annie from a derelict building, gunshots ringing through the deserted streets around them, he realizes rescuing her is just the beginning. He needs to keep her close to find out who is behind her capture, and to keep her safe.

A girl with a secret. Longbill Beach, 1982. Emily Vaughn gets ready for the prom. For an athlete, who is smart, pretty and well-liked, this night that should be the highlight of her high school career. But Emily has a secret. And by the end of the evening, that secret will be silenced forever. Forty years later, Emily’s murder remains a mystery. Her tight-knit group of friends closed ranks; her respected, wealthy family retreated inwards; the small town moved on from her grisly attack. But all that’s about to change.

Special Agent Macy Crow is a survivor. After a vicious hit-and-run nearly kills her, she gets right back to work, and now she’s gunning for a spot on the FBI’s elite profiling team. As an audition, she offers to investigate the recently discovered bones of Tobi Turner, a high school girl who disappeared fifteen years ago. While investigating with local sheriff Mike Nevada, a former colleague and onetime lover, Macy discovers a link between Tobi’s case and several others that occurred around the same time as her disappearance.

Deputy Shelby Lake was abandoned as a baby, saved by a stranger who found her in the freezing cold. Now, years later, a young boy is missing - and Shelby is the one who must rescue a child. The only evidence of what happened to 10-year-old Jeremiah Sloan is a bicycle left behind on a lonely road. After a desperate search fails to locate him, the close bonds of Shelby’s hometown begin to fray under the weight of accusations and suspicion. Everyone around her is keeping secrets.

Eleven years ago, the Co-ed Slayer murdered nine female students on the Oregon State University campus. Lacey Campbell barely escaped his attack, but lost her best friend whose remains were never found. As the sole surviving victim, Lacey helped send the sadistic serial killer to prison for life. Now a forensic odontologist examining teeth and bones for the state Medical Examiner, Lacey is devastated when she arrives at a crime scene and identifies the skeletal remains as her college friend’s.

Ten years ago, Lilly Carmichael left town without an explanation, breaking Braden Donnelly's heart. The death of her aunt has brought Lilly home and face-to-face with memories she thought were long buried. Still getting over a traumatic incident from her work as an NSA agent, Lilly initially dismisses the face at her window as a figment of stress-induced paranoia.

Police Chief Tucker Ambrose hopes the stolen bicycle is just a prank, but his years as a cop in Chicago tell him different. Then a body is discovered in the middle of the woods, staged with a Bible, a crucifix, and a rosary...and Tucker knows something dark and sinister has arrived in his town.

When a local girl falls prey to a sadistic serial killer, Nashville homicide lieutenant Taylor Jackson and her lover, FBI profiler Dr. John Baldwin, find themselves in a joint investigation pursuing a vicious murderer. The Southern Strangler is slaughtering his way through the Southeast, leaving a gruesome memento at each crime scene – the prior victim’s severed hand.

Ellery Hathaway knows a thing or two about serial killers, but not through her police training. She's an officer in sleepy Woodbury, Massachusetts, where a bicycle theft still makes the newspapers. No one there knows she was once victim number 17 in the grisly story of serial killer Francis Michael Coben. The only victim who lived. When three people disappear from her town in three years, all around her birthday - the day she was kidnapped so long ago - Ellery fears someone knows her secret. Someone very dangerous.

As a medical examiner, Samantha Owens knows her job is to make a certain sense of death with crisp methodology and precision instruments. But the day the Tennessee floods took her husband and children, the light vanished from Sam’s life. She has been pulled into a suffocating grief no amount of workaholic ardor can penetrate - until she receives a peculiar call from Washington, D.C. On the other end of the line is an old boyfriend’s mother, asking Sam to do a second autopsy on her son.

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.

As a teenager, Jill Shannon fell victim to her stepfather's cruel abuse. Now, as an adult, Jill's made it - she has a successful career and a solid, if not static, marriage to Detective Alex Shannon. Together they live out what seems to be a perfect life in Seattle. The vow she made as a teenager to never again be a victim lies dormant - until one day a reporter lures her to his hotel room under the pretense of an interview - and suddenly it all comes rushing back.

It starts as a prank - a way to blow off steam after a long summer at Camp Horseshoe. Among the teen counselors, tensions and hormones are running high. No wonder the others agree when Jo-Beth Chancellor suggests they scare Monica O'Neal a little.... or a lot. Monica has it coming, and no one will really get hurt. What could go wrong? Everything.

Sophie Winters nearly died. Twice. The first time, she's 14, and escapes a near-fatal car accident with scars, a bum leg, and an addiction to Oxy that'll take years to kick. The second time, she's 17, and it's no accident. Sophie and her best friend Mina are confronted by a masked man in the woods. Sophie survives, but Mina is not so lucky. When the cops deem Mina's murder a drug deal gone wrong, casting partial blame on Sophie, no one will believe the truth: Sophie has been clean for months, and it was Mina who led her into the woods that night for a meeting shrouded in mystery.

In Azalea, Mississippi, the only thing steamier than the summer days are the men of the King family. When the patriarch Randall King is found dead, Detective Arabella Matthews will race the clock to stop the killer from striking again. Benton, the eldest of the King siblings, has to decide if he wants to cooperate with the feisty detective or conduct his own investigation. The more he finds out about his father - and the closer he gets to Arabella - the more he wants to keep her safe. But the killer has different plans....

In Ava’s dreams, her son, Noah, looks just the way she remembers him: a sweet two-year-old in rolled-up jeans and a red sweatshirt. When Ava wakes, the agonizing truth hits her all over again. Noah went missing two years ago, and his body has never been found. Almost everyone, including Ava’s semi-estranged husband, Wyatt, assumes the boy drowned after falling off the dock near their Church Island home. Ava has spent most of the past two years in and out of Seattle mental institutions, shattered by grief and unable to recall the details of Noah’s disappearance.

Elena Martinez has hidden her eidetic memory all her life - or so she thinks. When powerful tech giant, Aether Corporation, selects her for a top-secret project, she can't say no. All she has to do is participate in a trip to the future to bring back data, and she'll be set for life. Elena joins a team of four other teens with special skills, including Adam, a science prodigy with his own reason for being there.

Six months ago, Charlotte almost lost everything. Now, she’s determined to keep her daughter, Elle, safe. So when local girls close to Elle in age and appearance begin to go missing, it’s her worst nightmare. Charlotte’s fears are confirmed when a frantic search becomes a shocking murder investigation. The girls’ bodies have been found - half-buried, and with traces of mud and wildflowers under their fingernails. As Charlotte’s obsession with keeping her daughter close pushes her marriage to the brink, local DI Madeleine Wood embarks on a gruelling search for the killer.

Someone is knocking at the door to Grace Adams' house, and he won't stop. Grace thinks she knows who it is, but when she goes to her second floor window for a look she sees a woman she doesn't recognize. The woman isn't alone for long before a man emerges from the dark of the surrounding woods, stabs her, and leaves her for dead. Trying to help, Grace goes to the woman and is shocked to find that it's her mother Leanne - a woman who abandoned her 11 years before.

As soon as Seneca Frazier sees the post on the Case Not Closed website about Helena Kelly, she's hooked. Helena's high-profile disappearance five years earlier is the one that originally got Seneca addicted to true crime. It's the reason she's a member of the site in the first place. So when Maddy Wright, her best friend from the CNC site, invites Seneca to spend spring break in Connecticut looking into the cold case, she immediately packs her bag.