Derrick Stockton is in his mid-twenties, approaching three years sober, and working a stable job in Ohio. After surviving the seemingly random horrors of his childhood at the hands of a sinister neighbor, he believes he's finally moved on. All that changes when a brutal murder occurs in his home state of West Virginia. His name is written in blood at the crime scene, and the only evidence is a blurry surveillance video offering a glimpse of the killer, one he knows to be long dead.

Bryan and Ellie Stockton hope they left behind their demons when they move to their idyllic new home in southern West Virginia. Above all, they want a fresh start for their young son, Derrick, who witnessed the tumultuous first years of their marriage—years that were rife with substance abuse, rage, and resentment. Their bright hope for the future is darkened when a child disappears from their neighborhood. The couple becomes suspicious of a reclusive resident with a degenerative brain disorder.

High up on the windswept cliffs of Pale Peak, Faye and Felix celebrate their new engagement. But soon, a chorus of ghastly noises erupts from the nearby woods: the screams of animals, the cries of children, and the mad babble of a hundred mournful voices. A dark figure looms near the windows in the dead of night, whispering to Faye. As the weather turns deadly, Felix discovers that his terrified fiancée isn't just mumbling in her sleep—she's whispering back.

It has been 20 years since the serial killer known as The Black Heart Killer terrorized the town of Newport in 1979. Life mostly returned to normal after the killer was captured. All the townspeople have to do is stay out of the woods where the bodies were abandoned.

This forest isn't charted on any map. Every car breaks down at its treeline. Mina's is no different. Left stranded, she is forced into the dark woodland only to find a woman shouting, urging Mina to run to a concrete bunker. As the door slams behind her, the building is besieged by screams. Mina finds herself in a room with a wall of glass, and an electric light that activates at nightfall, when the watchers come above ground. These creatures emerge to observe their captive humans and terrible things happen to anyone who doesn't reach the bunker in time.