Psychologist Arles Shepherd treats troubled children, struggling with each case to recover from her own traumatic past. Having just set up a new kind of treatment center in the remote Adirondack wilderness, Arles longs to heal one patient in particular: a 10-year-old boy who has never spoken a word --- or so his mother, Louise, believes. Hundreds of miles away, Cass Monroe is living a parent’s worst nightmare. His 12-year-old daughter has vanished on her way home from school. With no clues, no witnesses and no trail, the police are at a dead end. Fighting a heart that was already ailing, and struggling to keep both his marriage and himself alive, Cass turns to a pair of true-crime podcasters for help. Arles, Louise and Cass will soon find their lives entangled in ways none of them could have anticipated.

Julie Weathers isn't sure if she's running away or starting over, but moving to a remote island off the coast of Maine feels right for someone with reasons to flee her old life. The sun-washed, sea-stormed speck of land seems welcoming, the lobster plentiful, and the community close and tightly knit. She finds friends in her nearest neighbor and Callum, a man who appears to be using the island for the same thing as she: escape. But as Julie takes on the challenge of teaching the island's children, she comes to suspect that she may have traded one place shrouded in trouble for another, and she begins to wonder if the greatest danger on Mercy Island is its lost location far out to sea, or the people who live there.

Six million acres of Adirondack forest separate Natalie and Doug Larson from civilization. For the newlyweds, an isolated backcountry honeymoon seems ideal. But just as Natalie and Doug begin to explore the dark interiors of their own hearts, as well as the depths of their love for each other, it becomes clear that they are not alone in the woods. As they struggle with the worst the wilderness has to offer, a man watches them, wielding the forest like a weapon. He wants something from them more terrifying than death. And once they are near his domain, he will do everything in his power to make sure they never walk out again.

In her isolated home in the shadowy woods, Sandy Tremont prepares dinner after a fight with her daughter, Ivy. Nearby, two desperate men on the run make their way through the fading light, bloodstained and determined to leave no loose ends or witnesses. After almost 20 years as prison cellmates, they have become a deadly team: Harlan the muscle, Nick the mind and will. Opening the door to the Tremont home, Nick brings not only a legacy of terror but a secret that threatens to drag Sandy with him into the darkness.

When Liz Daniels discovers that her husband, Paul, has kidnapped their two children, she throws herself into the search for them. Her investigation uncovers a disturbing incident from Paul's past, and she begins receiving ominous threats, warning her to stay away. Liz digs deeper into his secrets --- only to discover that his plans are far more extreme than she ever could have imagined.

Nora Hamilton’s life is forever changed when her rock-solid policeman husband commits suicide. But the pieces don't add up. Relying on the methodical nature that serves her so well as a restorer of old homes, Nora struggles to understand what happened to her husband --- even as her insular, frigid mountain town is determined to keep its deadly secrets buried.