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.

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.

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.

Jake couldn’t feel much sympathy for the woman who’d married his wealthy, despicable, sworn enemy. But now that she was embroiled in a child custody battle, he would help her - and relish getting sweet revenge against her ex.... Superstardom hasn’t helped Gavin get over his first love, or the way she inexplicably left him. When he returns to Taylor’s Crossing and finds himself facing her, his bitterness is impossible to hide.

Dr. Charlotte Stone sees what others do not. A sought-after expert in criminal pathology, Charlie regularly sits face-to-face with madmen. Obsessed with learning what makes human monsters commit terrible crimes, Charlie desires little else from life - no doubt because when she was 16, she herself survived a serial killer's bloodbath: A man butchered the family of Charlie's friend, then left the girl's body on a seaside boardwalk one week later. Because of the information Charlie gave police, the Boardwalk Killer went underground.

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.

Frankie Elkin is an average middle-aged woman, a recovering alcoholic with more regrets than belongings. But she spends her life doing what no one else will - searching for missing people the world has stopped looking for. When the police have given up, when the public no longer remembers, when the media has never paid attention, Frankie starts looking. A new case brings her to Mattapan, a Boston neighborhood with a rough reputation. She is searching for Angelique Badeau, a Haitian teenager who vanished from her high school months earlier.

A small Georgia town erupts in panic when a young college professor is found brutally mutilated in the local diner. But it's only when town pediatrician and coroner Sara Linton does the autopsy that the full extent of the killer's twisted work becomes clear. Sara's ex-husband, Police Chief Jeffrey Tolliver, leads the investigation - a trail of terror that grows increasingly macabre when another local woman is found crucified a few days later.

It's been seven years since the Seattle Strangler terrorized the city. His victims were all young, pretty, their lifeless bodies found wrapped in a home-sewn white dress. But there was one who miraculously escaped death, just before the Strangler disappeared. Lara Church has only hazy memories of her long-ago attack. What she does have is a home in Austin, a job, and a chance at a normal life at last. Then Texas Ranger James Beck arrives on her doorstep with shattering news: The Strangler is back....

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.

Detective Kara Quinn, on leave from the LAPD, is on an early morning jog in her hometown of Liberty Lake when she comes upon the body of a young nurse. The manner of death shows a pattern of highly controlled rage. Meanwhile in DC, FBI Special Agent Mathias Costa is staffing his newly minted Mobile Response Team. Word reaches Matt that the Liberty Lake murder fits the profile of the compulsive Triple Killer. It will be the first case for the MRT. This time, they have a chance to stop this zealous, if elusive, killer before he strikes again.

FBI Supervisory Special Agent Dominic Sheridan is an accomplished expert in the Crisis Negotiation Unit. Practiced, professional, used to dealing with high-stakes situations under tense conditions, Dominic is a master at manipulating people. Everyone, that is, but the headstrong rookie agent bent on destroying her fledgling career. As a child, Ava Kanas put her life on the line when the mob executed her father. Now someone has killed her mentor, the man who inspired her to become an FBI agent - and she’s the only one who recognizes it was anything but a tragic accident.

When a woman is found brutally murdered on Austin’s lakeside hike-and-bike trail, investigative reporter Bailey Rhoads turns up on the scene demanding access and answers. She tries to pry information out of the lead Detective Jacob Merritt, but this case is unlike any he’s ever seen, and nothing adds up. With the pressure building, Jacob knows the last thing he needs is a romantic entanglement, but he can’t convince himself to stay away from Bailey.

Natalie Taylor, high priestess of the coven in quirky Giles, Massachusetts, just wants to stop seeing dead people. With all the elements needed for the spell now in place, she can finally complete the ritual to push the ghosts away. But when a body is found in Corey Woods, giving her the opportunity to prove that her long-lost love wasn't guilty of the identical murders years ago, some of the answers she needs to clear him lie on the far side of the veil. She's going to need help from both the living and the dead to catch the real killer.