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.

New to the force, detective Bridgette Cash faces her first murder case when a young woman's body is found in the forest. Convinced it's the work of a serial killer, she must navigate skeptical superiors and scant evidence to uncover the truth. As the clock ticks and the pressure mounts, she scrambles to gather clues and catch the perpetrator before they strike again.

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.

Thirteen years ago, Assemblyman Derrick Bell was murdered in his home by an intruder. His wife, Noelle Marshall, was left for dead. The crime was unsolved, but it wasn’t forgotten. Today the FBI is tackling a fresh perspective on the case and looking to Noelle, now a detective for the Deschutes County sheriff’s office, for new clues. It is reopening everything Noelle thought was behind her. Memories of her escape from a traumatic childhood. A marriage that wasn’t the perfect love story she’d been promised. And a husband whose charm and privilege hid a dark side.

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.