Fifty-five-year-old empty nester - and freshly retired FBI agent - Kate Wise finds herself drawn out of her quiet suburban life when her friend’s daughter is murdered in a home invasion - and she is implored to help. As Kate hunts the killer, she soon finds herself at the forefront of a manhunt as more bodies turn up - all suburban moms in perfect marriages - and it becomes apparent there is a serial killer stalking this quiet town.  

FBI Agent Ella Dark, 29, is given her big chance to achieve her life’s dream: to join the Behavioral Crimes Unit. Ella has a hidden obsession: She has studied serial killers from the time she could read, devastated by the murder of her own sister. With her photographic memory, she has obtained an encyclopedic knowledge of every serial killer, every victim, and every case. Singled out for her brilliant mind, Ella is invited to join the big leagues. 

In ONCE GONE, women are turning up dead in the rural outskirts of Virginia, killed in grotesque ways, and when the FBI is called in, they are stumped. A serial killer is out there, his frequency increasing, and they know there is only one agent good enough to crack this case: Special Agent Riley Paige. Riley is on paid leave herself, recovering from her encounter with her last serial killer, and, fragile as she is, the FBI is reluctant to tap her brilliant mind. Yet Riley, needing to battle her own demons, comes on board, and her hunt leads her through the disturbing subculture of doll collectors, into the homes of broken families, and into the darkest canals of the killer’s mind. As Riley peels back the layers, she realizes she is up against a killer more twisted than she could have imagined.

When a serial killer case spanning three U.S. states goes cold, Adele returns to San Francisco and to the man she hopes to marry. But after a shocking twist, a new lead surfaces and Adele is dispatched to Paris, to lead an international manhunt. Adele returns to the Europe of her childhood, where familiar Parisian streets, old friends from the DGSI, and her estranged father reignite her dormant obsession with solving her own mother’s murder

To avoid the hassle of a media frenzy, the local police sergeant decides contact his old mentor Wade Parker and ask him to consult on the case. After nearly dying eight months ago, Miranda Steele can't wait to get back to real detective work. Nobody deserves to die that way. But this one isn’t so easy. If she can't solve this case, not only will she fail her destiny, another psycho killer might get away with murder. Meanwhile, Parker harbors secret reservations about their new venture together. Especially when he suspects there might be more to this murder than meets the...eye.