At first glance, Phil Pendleton and his son Adam are just an ordinary father and son, no different from any other. What no one knows is that Phil is a prisoner, and that up until a few weeks ago and a chance encounter at a grocery store, he had never seen the child before in his life.

1983: Three students from a small college embark on a week-long road trip to film a documentary on roadside memorials for their American Studies class. The project starts out as a fun adventure with long stretches of empty road and nightly campfires where they begin to open up with one another. But as they venture deeper into the Appalachian backwoods, the atmosphere begins to darken. They notice more and more of the memorials feature a strange, unsettling symbol hinting at a sinister secret.

Connie can't deny she's nervous about meeting her boyfriend's family. Spending the weekend at their ritzy woodland summer home, Evan's already given her fair warning that his parents are cold, snobbish, and especially unpleasant toward those outside their usual social circles. So when Evan's mother warmly greets them with open arms, Connie is as confused as he is. They're so friendly, in fact, Evan himself can hardly believe they're real. Then, while helping Evan's mother with dinner, Connie overhears strange noises coming from the basement—what almost sounds like voices calling out for help.

Blackwood mansion looms, surrounded by nightmare pines, atop the hill over the small town of New Haven. Ben Bookman, bestselling novelist and heir to the Blackwood estate, spent a weekend at the ancestral home to finish writing his latest horror novel, The Scarecrow. Now, on the eve of the book’s release, the terrible story within begins to unfold in real life.

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.