Officer Rainie Conner is leading her first homicide investigation, a school shooting. The police chief's 13-year-old son is the prime suspect, but Rainie doesn't believe he pulled the trigger. With the help of FBI profiler Pierce Quincy, she races to uncover the truth. But a ruthless killer watches from the shadows--and lives to destroy her as he has destroyed her peaceful little Oregon community.

Twenty years ago, Melanie Stokes was abandoned in a Boston hospital, then adopted by a wealthy young couple. Gifted with loving parents, a doting brother, and an indulgent uncle, Melanie has always considered herself lucky. Until the first cryptic, threatening note arrives: “You Get What You Deserve.” Melanie has no memory of her life before the adoption. Now someone wants her to remember it all - even the darkest nightmare the Stokes family ever faced: the murder of their first daughter.

What do you do when a killer targets the people you love most? How do you protect them when he knows their most secret fears and hidden desires? When he knows just when to strike? And, most of all, when he knows the same about you?

A serial killer watches and waits. Each time, he takes two victims, preparing the first's body with all the clues the police need to find the second, who is still alive. The clock ticks, and the second one can still be saved. But the police never make it in time. The second one dies. For years, the killer has plagued the city with the same pattern, but the police never pick up on it quickly enough.

A man is dead, shot three times in his home office. But his computer has been shot twelve times, and when the cops arrive, his pregnant wife is holding the gun. D. D. Warren arrives on the scene and recognizes the woman - Evie Carter - from a case many years back. Evie's father was killed in a shooting that was ruled an accident. But for D.D., two coincidental murders is too many. Flora Dane sees the murder of Conrad Carter on the TV news and immediately knows his face. She remembers a night when she was still a victim - a hostage - and her captor knew this man.

She moved far away to try and forget her past. A past that seeped back in when she least expected it and crushed her soul, over and over. She tried to keep the evidence packed away in boxes high up on a closet shelf like carefully packing away a tragic part of her life. As if sealing the boxes was sealing away a time in her life she desperately wanted to go back and change. Until one day, a mysterious letter arrives from an unknown sender that unravels everything.

For Kimberly Quincy, FBI Special Agent, it all starts with a pregnant hooker. The story Delilah Rose tells Kimberly about her johns is too horrifying to be true; but prostitutes are disappearing, one by one, with no explanation, and no one but Kimberly seems to care.

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.

One question, a split-second decision, and Brian Darby lies dead on the kitchen floor. His wife, state police trooper Tessa Leoni, claims to have shot him in self-defense, and bears the bruises to back up her tale. For veteran detective D. D. Warren it should be an open-and-shut case. But where is their six-year-old daughter? As the homicide investigation ratchets into a frantic statewide search for a missing child, D. D. Warren must partner with former lover Bobby Dodge to break through the blue wall of police brotherhood, seeking to understand the inner workings of a trooper’s mind while also unearthing family secrets.

Eight years ago, Sharlah May Nash's older brother beat their drunken father to death with a baseball bat in order to save both of their lives. Now thirteen years old, Sharlah has finally moved on. About to be adopted by retired FBI profiler Pierce Quincy, and his partner, Rainie Conner, Sharlah loves one thing best about her new family: they are all experts on monsters.

Clare is ready for a break. It's been a tough year and now she wants to put her feet up. Arriving at the Italian villa for their summer holiday, she decides it's high time her husband and his family did some of the work. After all, her husband owes her.... Now her brother-in-law Jamie has brought a wife, someone none of them have met before. Ella is everything Clare isn't. Glamorous. Young. Influential. But she knows a secret about Clare. Something that has the power to break the whole family apart.

It was a case guaranteed to spark a media feeding frenzy: a young mother, blond and pretty, disappears without a trace from her South Boston home, leaving behind her four-year-old daughter as the only witness and her handsome, secretive husband as the prime suspect. But from the moment Detective Sergeant D. D. Warren arrives at the Joneses - a snug little bungalow, she senses something off about the picture of wholesome normality the couple worked so hard to create.

Justin and Libby Denbe have the kind of life you’d find in the pages of a glossy magazine: A beautiful 14-year-old daughter. A gorgeous brownstone on a tree-lined street in Boston’s Back Bay neighborhood. A great marriage, admired by all. A perfect life. When investigator Tessa Leone arrives at the crime scene in the foyer of the Denbes’ home, she finds scuff marks on the floor and a million tiny pieces of bright green Taser confetti. The family appears to have been abducted, with only a pile of their cell phones and electronic devices remaining. No witnesses, no ransom demands, no motive. Just a perfect little family, gone.

It was a case that haunts Bobby Dodge to this day - the case that nearly killed him and changed his life forever. Now, in an underground chamber on the grounds of an abandoned Massachusetts mental hospital, the gruesome discovery of six mummified corpses resurrects his worst nightmare: the return of a killer he thought dead and buried.  

Charlene Grant believes she is going to die. For the past few years, her childhood friends have been murdered one by one. Same day. Same time. Now she’s the last of her friends alive, and she’s counting down the final four days of her life until January 21st. Charlene doesn’t plan on going down without a fight. She has taken up boxing, shooting, and running. She also wants Boston’s top homicide detective, D. D. Warren, to handle the investigation. But as D. D. delves deeper into the case, she starts to question the woman’s story.