The winters in Willow Falls, Iowa are cold, brutal and unforgiving. And so is the town’s newest visitor. Except he’s not passing through. He’s here on vacation, for some fun and he’s going to stay for a while. They call him “Robin Hood”, a winter serial killer who has left a gruesome trail of horror and d ath across four Midwestern states. His grisly trademark is skewering his victims to tree trunks using a hunting crossbow. Now he’s here.

A lifeless girl slips into the river, cold and crumpled. Her body washes away with the rain. Her killer remains a mystery. Sheriff Elven Hallie has been longing for a new case that would add some excitement to his small-town life. But a dead girl wasn’t what he expected. On the last murder case he worked, he was just a deputy with an experienced Sheriff to guide him and they were looking for an outsider. This time, he’s in charge, and the killer is part of their community.

The Cheyenne Police Department doesn't handle many murders. So when a woman is found mutilated and crucified, detective Kyle Dixon catches a case where all the evidence has long since been destroyed. Any detective would find it a difficult investigation, but to make matters worse, Dixon is paired with Ethan Baudin: a new detective in the unit who doesn't believe the law should apply to those that chase monsters. They find that the murder is connected to a rash of fraternity rapes and the case becomes highly publicized and politically charged.

Following the incident that brought justice to her parents’ killers but ended her career, former FBI Special Agent Rebecca West needs a fresh start. Hoping to find peace, she decides to spend a few months in the sleepy beach town of Shadow Island, where she spent idyllic summers as a kid. However, her vacation is cut short when a seventeen-year-old goes missing with no leads or clues. When the girl’s body is found in a nearby marsh with strangulation marks around her neck, Rebecca can’t say no when the overworked sheriff asks her to help investigate.

PI Bridget Hartley is obsessed with all things mystery. She even has a reputation for being Serenity’s go-to detective. With the exception of small-town drama and the occasional crime, life in Serenity is serene. Until a call from panicked parents searching for missing teens sets off a chain of events that no one could have foreseen. Could hormones and young love be the reasons for their abrupt disappearance? While searching for the missing lovebirds, Bridget stumbles upon a string of bizarre and unfortunate events. Events with potential connections to other missing teen couples.