Twenty years ago Emily Mills's father was murdered, and she found his body hanging in the backyard. Her younger sister, Madison, claims she was asleep in her room. Her older sister, Tara, claims she was out with friends. The tragedy drove their mother to suicide and Tara to leave town forever. The killer was caught. The case closed. Ever since, Emily and Madison have tried to forget what happened that night - until an eerily similar murder brings it all back.

FBI special agent Mercy Kilpatrick has been waiting her whole life for disaster to strike. A prepper since childhood, Mercy grew up living off the land — and off the grid — in rural Eagle’s Nest, Oregon. Until a shocking tragedy tore her family apart and forced her to leave home. Now a predator known as the cave man is targeting the survivalists in her hometown, murdering them in their homes, stealing huge numbers of weapons, and creating federal suspicion of a possible domestic terrorism event.

When a man is shot in the head, Bree Taggert and her new partner, veteran detective Dana Romano, respond to the call. They break the news to the victim’s ex-wife and learn the estranged couple’s five-year-old daughter was supposed to have been with him. What starts as a murder investigation quickly morphs into a desperate search for a missing child. The case stirs memories of Bree’s own traumatizing childhood. To find the little girl, Bree will have to relive her own terrifying past. 

Eleven years ago, the Co-ed Slayer murdered nine female students on the Oregon State University campus. Lacey Campbell barely escaped his attack, but lost her best friend whose remains were never found. As the sole surviving victim, Lacey helped send the sadistic serial killer to prison for life. Now a forensic odontologist examining teeth and bones for the state Medical Examiner, Lacey is devastated when she arrives at a crime scene and identifies the skeletal remains as her college friend’s.

FBI Special Agent Cate Wilde is back home on a remote Pacific Northwest island when she gets the call: a teenager’s skeletal remains have been found on a nearby island. Together with Tessa Black, a childhood friend turned local deputy, Cate confronts dreary weather and bleak leads to make sense of the death. The complications pile up as Cate is distracted by the coroner on the case - and by nagging memories that draw her twenty years into the past.