Harley, reeling from her being put on leave, from her long-term relationship falling apart, and from her father’s dying, is hardly ready to return to her hometown, to its long-buried secrets, and her tortured past. She spent her life escaping this small town—but, as she settles back in, she wonders: Might she have been wrong all this time? Yet as more bodies surface and as every clue leads to a dead end, Harley, clashing with her new partner, realizes she’s in a race against time.

FBI Special Agent Eve Hope can’t escape the shadow of her notorious serial killer father—though he is jailed, the puzzle of the loving father of her childhood haunts her, and now, assigned to a copycat case, she is forced to face her worst memories. Can she stop this new killer before he claims a new victim—while saving herself from being swallowed by her past?

FBI Special Agent Faith Bold, hospitalized and haunted by her encounter with a serial killer, is ready to retire—when Turk, a K9 German shepherd, himself traumatized, comes into her life. When a new serial killer strikes, leaving his victims at the bottom of isolated wells, Faith, this time with Turk at her side, will stop at nothing to hunt him down and save the next victim before it is too late.

FBI Special Agent Claire King dies chasing a killer—and is resuscitated minutes later to realize she has changed. Dark images flash through her mind in a newfound power, visions leading her towards serial killers. But the riddles that plague her are obscured and conflicting, and Claire soon realizes that they may lead her to crack a case—or may just put her in the crosshairs of a killer.

The FBI is alarmed by the rash of killings on trains throughout the country, and they realize they have to put together a joint task force to tackle it. Through a partnership with the rail police, FBI Special Agent Cailtin Dare is chosen to spearhead the new unit designed to hunt killers using trains across the country.

FBI Special Agent Maya Gray, 39, has seen it all. She’s one of BAU’s rising stars and the go-to agent for hard-to-crack serial cases. When she receives a handwritten postcard promising to release 12 kidnapped women if she will solve 12 cold cases, she assumes it’s a hoax.

A modest, Midwestern girl, Kaylie Brooks falls in love with a wealthy man who sweeps her off her feet and transplants her to a mansion in Palm Beach. But ominous signs abound, and Kaylie, out of place, realizes she is with a husband she barely knows. When a woman is murdered, Kaylie realizes she must dig deeper and uncover the secrets of this wealthy community, and of her husband’s past. But is she ready to face what she discovers?

Alexa Chase, 34, a brilliant profiler in the FBI’s Behavioral Analysis Unit, was too good at her job. Haunted by all the serial killers she caught, she left a stunning career behind to join the US Marshals. As a Deputy Marshal, Alexa—fit, and as tough as she is brilliant—could immerse herself in a simple career of hunting down fugitives and bringing them to justice.

When a new serial killer strikes, the FBI, stumped, turns to its brilliant forensic examiner and entomologist, Fiona Red, with her unparalleled genius and ability to offer insights at crime scenes based on her insect expertise. When another victim turns up in a stretch of rural woods covered in unusual bugs, Fiona knows right away that something doesn’t add up. In this master game of wits, Fiona may have finally met her match.

Tara Strong has risen to become her county’s Deputy Sheriff through her bravery and her brilliant capacity to enter killer’s minds. Small-town life in the mountains, centered around their picturesque lake, should be idyllic. But Tara has already seen enough to know that there is a dark side to everything, that small towns hide secrets, that everyone has something in their past—and that a killer may just be lurking right next door.