The first victim is found in a snow-covered Philadelphia field. Detective Vito Ciccotelli enlists the aid of archaeologist Sophie Johannsen to determine exactly what lies beneath the frozen ground. Despite years of unearthing things long buried, nothing can prepare Sophie for the matrix of graves dug with chilling precision. The victims buried there haunt her. But the killer isn't done yet. He is cold and calculating, the master of a twisted game. Even with Vito and Sophie hot on his trail, he will not stop.

Psychiatrist Tess Ciccotelli has spent her entire career trying to help people, and now, just as her patients are making headway and her practice is thriving, everything is about to come crashing down. Someone is using her patients' deepest, darkest secrets against them, pushing them to commit suicide, and framing Tess in the process.

There is a serial killer on the loose preying on vulnerable women. The only identifiable mark the killer leaves are letters - sometimes one, sometimes two - all carved into the torsos of his victims. Together, they spell “Sydney”. When he grabs Daisy Dawson, he believes he has found his next victim. But despite her small stature, she fights back with an expertise that quickly frees her. Before fleeing the scene, Daisy also manages to grab what proves to be crucial evidence: a necklace from around the killer’s neck.

Psychologist Faith Corcoran is desperate to escape the stalker who’s made her life a nightmare for the past year—desperate enough to run to the one place that has been her nightmare far longer. Her recent inheritance of her grandmother’s old house in Cincinnati offers sanctuary in which she can start her life anew, but requires that she face the dark memories that still resonate to this day. But she has no idea how close to home her fears still are...

Cady Maddix survived a brutal upbringing - emotionally scarred but hardened - with a will for self-preservation. Hunting fugitives has given her life purpose and control. But when the Deputy US Marshal returns home to care for her Alzheimer’s-stricken mother, a new case stirs old memories. Child killer Samuel Aldeen has broken out of a nearby facility for the criminally insane, and the authorities believe he was aided by accomplices, both inside and out.

Former Army brat Morgan Albright has finally planted roots in a friendly neighborhood near Baltimore. Her friend and roommate Nina helps her make the mortgage payments, as does Morgan's job as a bartender. But after she and Nina host their first dinner party—attended by Luke, the flirtatious IT guy who'd been chatting her up at the bar—her carefully built world is shattered. The back door glass is broken, cash and jewelry are missing, her car is gone, and Nina lies dead on the floor.

At first, they struggle to escape. Then a torrent of blows rains down upon their bodies until their eyes cloud over in final agony. The killer shows no remorse - just a twisted need to witness each victim's last terrified moments. Public defender Rachel Wainwright is struggling to reopen a decades-old case, convinced that the wrong man is in prison. Homicide detective Deke Morgan doesn't want to agree. But if Rachel's hunch is correct, whoever fatally bludgeoned young, beautiful Annie Dawson 30 years ago could be the source of a new string of brutal slayings.

Austin homicide detective Jordan Poe is hunting a serial killer she fears is the same man who assaulted her sister, Avery, two years ago. The details line up: the victims are the same age, same type, dead by the same grim MO. Luckily Avery survived. But the terrible memories linger, making Jordan more determined than ever to stop this monster in his tracks.

Former FBI agent Samantha Dark was one of the most respected profilers in the bureau, an expert on the twisted minds and dark hearts of the most depraved criminals. But when her own former lover turned out to be the serial killer she was hunting, Samantha's career was destroyed. Blamed for the FBI's failure on the complex case, Samantha left Washington, DC, for the quiet anonymity of Alabama.

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.

Bliss Cawthorne is John Cawthorne’s only legitimate daughter, but her father’s wealth has complicated matters. Mason Lafferty believed he wasn’t good enough for the boss’s daughter and broke Bliss’s heart after saving her life. Yet now he’s back in Bittersweet, determined to make her trust him again.

FBI Hostage Rescue Team member Shane Livingstone is frustrated when an injury sidelines him during an operation to catch a sadistic killer. A killer who auctions off vicious ways to torture his victims and screens the events for money on the dark web. When a teammate dies during the op, a devastated Shane vows to track down the monster responsible—but to do so he’ll need access to specialized skills he doesn’t possess.

Kit Darling is a maid with a snooping problem. She’s the “invisible girl,” compelled to poke into her wealthy clients’ closely guarded lives. It’s a harmless hobby until Kit sees something she can’t unsee in the home of her brand-new clients: a secret so dark it could destroy the privileged couple expecting their first child. This makes Kit dangerous to the couple. In turn, it makes the couple—who might kill to keep their secret—dangerous to Kit.

As a sniper with the elite Massachusetts State Police SWAT Team, Bobby Dodge saved a woman and her young son by shooting her armed husband. But vicious rumors begin to circulate the next morning when Bobby loses his gun and his privileges. It turns out the dead man was the son of a prominent Boston judge and had accused his wife of poisoning their son.

Three children, running in the woods behind their school, stumble upon a partially buried female body, eyes and mouth glued shut. Close behind the children is their teacher, Anne Navarre, shocked by this discovery and heartbroken as she witnesses the end of their innocence. What she doesn't yet realize is that this will mark the end of innocence for an entire community, as the ties that bind families and friends are tested by secrets uncovered in the wake of a serial killer's escalating activity.