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.

When the first victim is found dead in his kitchen with a mysterious number and message on his forehead, FBI Agent Victoria Heslin knows this is no ordinary hit job. It’s also just the beginning. As she follows the leads, calls start coming in—more dead bodies across D.C. and Virginia, each with a different message. With no common denominator connecting the victims, Victoria fears anyone might be next. Then the killer leaves a personal note for Victoria, making clear she isn’t just investigating the case, she’s part of the equation.

When Detective Casey White discovers the body of a beautiful teenage girl in a white nightgown near the shoreline in North Carolina’s Outer Banks, a familiar fear floods through her. Could this be Hannah, her sweet, blue-eyed daughter snatched from home 14 years ago? But it only takes one look to confirm that the girl with dark bruising around her throat is another family’s tragedy. Putting her own grief aside, Casey digs into unsolved missing child cases in the area. The victim is Cheryl Parry, one of two little girls taken during a family beach vacation nine years ago.

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

Detective Megan Carpenter is no stranger to evil. Escaping the horrors of her old life, she’s vowed never to let anyone hurt her or those she loves ever again. Joining the small police force in Jefferson County’s Port Townsend, Megan is determined to get every victim of a crime the justice they deserve. So when Ruth Turner walks into the Sheriff’s office claiming her sister Ida Watson has been missing for over a month, Megan’s instincts tell her that she needs to do more than just file a report.

It’s been twenty years since Leigh found the murdered body of her twelve-year-old brother, Troy. Her father was arrested for the crime, but she never accepted that he did it. Her hunt for the real killer almost cost her everything. Now working for the FBI, Leigh is called back to New Hampshire when a series of copycat crimes are committed. Only the killer has left a very specific calling card, a plastic army figurine, the same as the one she found on Troy’s body, and carved into its base: Leigh’s name.

Deep in the Yukon wilderness, a town is being built. A place for people to disappear, a fresh start from a life on the run. Haven’s Rock isn’t the first town of this kind, something detective Casey Duncan and her husband, Sheriff Eric Dalton, know firsthand. They met in the original town of Rockton. But greed and deception led the couple to financing a new refuge for those in need. This time around, they get to decide which applicants are approved for residency.

Tragedy has stalked Blake Larsen her entire life. After the violent death of her parents leaves her orphaned, her Green Beret brother Caleb is all she has left. He was there the day she graduated high school and the first person she called after she became a federal agent. Then the cops find him swinging from the rafters. The horrific discovery pushes Blake to the edge of despair. Then one of Caleb's closest friends is violently murdered outside her front door—and the killer snatches a folder from his dying fingers. It's clear Kyle was silenced moments before coming clean

When Sarah returns to her hometown of Cedarbrook for her brother's funeral, she expects grief and sorrow—but not fear. Her brother's death, ruled a mysterious drowning in the frozen waters of Echo Lake, doesn't add up. As Sarah digs deeper, she discovers her brother wasn't the first to meet this fate. Several others have drowned or vanished under strange circumstances, their bodies pulled from the icy depths of the lake with no explanation.

Elizabeth Benoit ran for sheriff to wipe out the corruption in the good old boys network of Eckardt County, but she has yet to break in her shoes when a stranger's body is found in a ravine. With her ex back in town, a new deputy detective on the edge of losing control, and a crooked ex-sheriff out for revenge, Elizabeth's resources are stretched thin. And then the second body drops.