Ex-FBI profiler River Ryland still suffers from PTSD after a case went horribly wrong. Needing a fresh start, she moves to St. Louis to be near her ailing mother and opens a private investigation firm with her friend and former FBI partner, Tony St. Clair. They're soon approached by a grieving mother who wants them to find out what happened to her teenaged son, who disappeared four years ago. River knows there's almost no hope the boy is still alive, but his mother needs closure, and River and Tony need a case, no matter how cold it might be.

Grappling with the aftermath of a tragic incident that altered her life, ex-police officer and bestselling mystery author Erin Delaney finds solace in the tranquility of a cabin nestled deep in the Smoky Mountains. But her newfound peace is shattered when cries pierce the night, hinting at a haunting presence lurking in the woods. When local police chief Adrian Nightengale seeks her help with a baffling murder case, she is thrust back into the world of crime solving. As they delve into the investigation, Erin's intuition reveals chilling truths about the killer's motives and methods.

Hostage negotiator Carrington Reed is called to the scene when reports come in that fifteen hostages are being held by the Kendrix brothers in an abandoned house in south Texas. When she arrives on site, Carrington quickly learns that the brothers are armed and refuse to release their victims, a group of undocumented immigrants, until the local police identify their father’s murderer. Working closely with Levi Ehrlich, a handsome investigative reporter who has covered some of Carrington’s negotiations in the past, she finds herself being undeniably drawn to him.

Detective James Holton has been honorably discharged from the Army Criminal Investigation Division due to wounds sustained when an IED blew up near him. Now with the Lake City Police Department, he's rooming with his good buddy and partner, Cole, while he figures out his family dynamics. Physician Assistant Lainie Jackson is eighteen months out from an attempted murder perpetrated by her ex, which ended when she managed to grab the weapon and shoot him. When he appears to have survived and is back to finish the job he started, Lainie insists it's not possible.

Riley Bishop is a single mother, working at home as a graphic designer to provide for her two children, Sadie and Oliver. But something is very wrong. Riley starts forgetting things—like appointments, where she put her keys, and where she parked her car. And then she thinks she sees her deceased ex-husband while out shopping. But as Riley begins to question her own sanity, her twelve-year-old Sadie goes missing. Soon Riley finds it harder and harder to know what is truth and what are lies as she is forced to question her own reality while she searches for her daughter.

Rookie firefighter Emily Micah is determined to prove herself as a new recruit to the elite Jude County Hotshots wildfire team. Assigned to the film set of The Drifters, Emily's mission is to protect the cast and crew from the special effects that could ignite the tinder-dry Montana forest and start a wildfire.

Private investigator Kenna Banbury lost everything two years ago at the hands of a serial killer. From the ashes of that encounter, she’s built a life she believes in, searching for the lost and forgotten all over the western US. When a series of murders drags her into an FBI investigation, Kenna finds herself back in the place where it all went wrong. Struggling to make sense of the case, Kenna’s past and present collide in a deadly plot that risks another betrayal and threatens to shatter everything she’s built.

Airport Ranger volunteer Stacy Broussard expected a peaceful Saturday morning ride around the perimeter of Houston's airport. What she encounters instead is a brutal homicide and a baffling mystery. Next to the body is an injured dog, the dead man's motorcycle, and a drone armed with a laser capable of taking down a 747. Though FBI Special Agent Alex LeBlanc sees a clear-cut case of terrorism, his past has taught him to be suspicious of everyone, even witnesses. Even bleeding-heart veterinarians like Stacy.

As security agent Jonah Gray zeroes in on his current mission, he finds scientist Rachel Atwood in his crosshairs. Right before his foster brother died, he handed Jonah a slip of paper with the woman’s name on it and muttered the word “killed.” But the more Jonah gets to know Rachel, the more he’s uncertain if she’s a killer or a target. Rachel Atwood hopes to leave trouble behind when she takes a new research position at a cosmetics company located on Lantern Beach. But things aren’t as idyllic on the coastal island as she’d assumed.

Kaely Quinn's talents as an FBI behavior analyst are impossible to ignore, no matter how unorthodox her methods. But when a reporter outs her as the daughter of an infamous serial killer, she's demoted to field agent and transferred to St. Louis. When the same reporter who ruined her career claims to have received an anonymous poem predicting a string of murders, ending with Kaely's, the reporter's ulterior motives bring his claim into question. But when a body is found that fits the poem's predictions, the threat is undeniable.

As a former smokejumper, arson investigator Bri Tucker knows her way around fires. But after a mysterious blaze takes the life of a former colleague, Bri inherits a curious puzzle from him that raises questions about several fiery deaths. Someone, however, doesn’t want her picking up where he left off in search of answers. When she teams up with ATF Special Agent Marc Davis to solve the puzzle, the case heats up—as does the attraction between them.

Police Chief Autumn Long is fighting to keep her job when an unexpected wave of violent crime sweeps through her small Alaskan town. Does Grier Carter, a relative newcomer to town, actually have her back? Or is she all alone as the body count rises?

Disgraced attorney Andi Slade is seeking justice for the killer who destroyed her reputation and her career. But going undercover as an ice road trucker in Alaska to find answers is just the tip of the iceberg. A brutal snowstorm, a handsome stranger, and an unsolved cold case send Andi's plans into a tailspin. Former CID investigator Duke McAllister refuses to give up searching for his fiancée who disappeared two years ago on the Dalton Highway. When he rescues a woman on the side of the road, he knows just how much danger she’s in.

Now that Alexandra "Alex" Donavan is finally free of her troubled upbringing, she's able to live out her childhood dream of working for the FBI. But soon after she becomes a member of the FBI's elite Behavioral Analysis Unit, authorities in Kansas and Missouri contact them about bodies found on freight trains traveling across the country - all killed in the same way.

As the CEO of a successful technology firm, Nia Anderson routinely makes split-second decisions. Now, every choice she makes could lead to life in prison or her own untimely death. She knows freedom lies in finding the real killer, but the evidence is stacked against her. Just when Nia thinks things can't get any worse, everything spins even more out of control.