Fifteen years ago, the Rookie Club began as a tight-knit band of female cops struggling for respect. Jamie Vail was one of them. So was Natasha Devlin, the woman Jamie caught in bed with her husband. When Natasha Devlin turns up dead, Jamie can't bring herself to care. She's got enough on her plate, hunting a sexual predator who preys on female officers. He leaves them alive, but brutalized. But when the MO of the Devlin murder matches the MO of the perp in Jamie's case, she's brought in on the homicide investigation and back into the Rookie Club she has been avoiding.

Seven years after making her escape from an abusive marriage, Dr. Annabelle Schwartzman is settling into her position as medical examiner in the city of San Francisco. Doing what she loves, she can almost put the trauma of her past behind her—until she confronts the case of a young woman, 16 weeks pregnant. Everything about the case says the woman took her own life. As hard as Schwartzman tries to make peace with the evidence in her head, something about the case won’t leave her alone. She’s all too aware of how similar the circumstances are to her own past.

Ex-FBI agent Cody O'Brien lives a quiet life in Northern California. Self-sufficient and content, she provides a good home for herself and her eight-year-old son, Ryan. But all of that is shattered when Ryan is kidnapped is broad daylight. Cody's greatest fear is knowing the true motive behind the abduction. For her entire life is a lie - one so easily exposed, and so very dangerous. A woman of hard-earned courage, she escaped the killers responsible for her husband's murder and learned to start over. Failed by the Witness Protection Program, she trusts only herself to save her son.

After surviving a car accident on an icy road in Hagen, North Dakota, Lily Baker regains consciousness with no idea where or who she is. Scattered Bible verses and the image of a man lying in a pool of blood haunt her memory. The same night of the accident, a young woman is murdered and tossed in a dumpster. Kylie Milliard, Hagen's only detective, doesn't immediately recognize the victim, but Kylie soon discovers that Lily and the dead woman share a dark past...if only Lily could remember what it was.

As though stumbling out of a nightmare, rookie cop Alex Kincaid awakens in her car, dazed and confused. Parked on an unfamiliar street, she's outside an unfamiliar home with no recollection of how she got there, and no memory of the night before. Then, her nightmare becomes reality. Alex's first call of the day takes her to the same street, to the same house, where a man has been brutally killed. Alex thinks the man is a perfect stranger - until she finds herself the main suspect in his murder.

A tough special agent with the Department of Justice and a dedicated single mother to her orphaned nephews, Samantha Chase is unbreakable. Until two women, both from the shadows of Sam's past, are discovered strangled. For Sam, the most unnerving detail is the eucalyptus branch tucked behind the victims' ears - the signature of a notorious serial murderer already convicted and executed for his crimes.

In the remote forests of Stillwater, Minnesota, you can scream for days and no one will hear you. So when the bodies of two 15-year-old girls are discovered frozen in the snow, Special Agent Nikki Hunt is sure the killer is local: Someone knew where to hide the girls and thought they would never be found. Though Nikki hasn’t been home in 20 years, she knows she must take over the case.

A woman is found naked, badly beaten and barely alive in the New Mexico mountains. The shocking discovery plunges Albuquerque Detective Alyssa Wyatt into a case that will test her to the limit. It appears that Callie McCormick is the latest plaything of a shadowy psychopath that leaves a long shadow on the streets of New Mexico - an individual linked to a string of deaths but leaving no evidence. But when Alyssa makes a breakthrough that just might reveal the killer, she unknowingly puts herself in the crosshairs of a brutal maniac - one with an old score to settle.

Wanted: A picturesque new town, a fresh start, and a much-needed escape from the constant reminder that the world is still full of bad guys. For FBI agent Olivia Knight, that perfect place is Belle Grove, a charming small town in Northern Virginia, a place hidden by lush greenery and away from the big city. But when Olivia finds a young girl malnourished and disheveled outside her home, she is thrown into a disturbing case. In order to catch the culprit and find the missing children in her new hometown, Olivia must dive deep into the twisted mind of a deranged serial kidnapper.

Tracy Crosswhite has spent 20 years questioning the facts surrounding her sister Sarah’s disappearance and the murder trial that followed. She doesn’t believe that Edmund House - a convicted rapist and the man condemned for Sarah’s murder - is the guilty party. Motivated by the opportunity to obtain real justice, Tracy became a homicide detective with the Seattle PD and dedicated her life to tracking down killers.

Twenty-year-old Kendele Byers is savagely killed and buried in a shallow grave. She had a violent past, a bizarre, kinky line of work, and the suspect list grows longer every day. But when another woman is murdered, Detective Mitchell Lonnie realizes that there's something much more sinister afoot: a connection between the two murders. Both victims had received a clue hinting at their oncoming demise several minutes before they were attacked. There's a serial killer in Glenmore Park.

Blake Wilder is plagued with nightmares from her dark and twisted past. Fourteen years ago, her entire family was taken from her. Her parents murdered and her sister taken. At the age of 22, Blake joined the FBI in hopes of one day discovering the truth behind the mysteries of her own past.

When Penny Matthews, a seven-year-old girl with blonde curls and a gap-toothed smile, goes missing in the Appalachian mountains, Detective Ellie Reeves is called straight to the scene. According to Penny’s parents, their daughter vanished after a picnic by the creek. All that’s left behind is a pink friendship bracelet etched with “Penny”.

Detective Jenna Murphy comes to the Hamptons to solve a murder - but what she finds is more deadly than she could ever imagine. No. 7 Ocean Drive is a gorgeous, multi-million-dollar beachfront estate in the Hamptons, where money and privilege know no bounds. But its beautiful gothic exterior hides a horrific past: It was the scene of a series of depraved killings that have never been solved. Neglected, empty, and rumored to be cursed, it's known as the Murder House, and locals keep their distance.

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.