James Donahue discovers a video that he believes shows his sister, Heather, who disappeared in the Black Hills Forest 20 years earlier. Determined to uncover the truth, James sets out with a group of friends—Lisa, Peter, and Ashley—to investigate. They are guided by locals Lane and Talia, who initially found the footage. Equipped with modern technology such as GPS devices, cameras, and drones, the group enters the forest with hopes of solving the mystery and confirming whether Heather is still alive.

As night falls, the group experiences increasingly eerie occurrences and strange noises that lead to rising tension among them. Tensions escalate when they become disoriented, finding themselves unable to leave the forest despite their sophisticated equipment. They encounter strange stick figures and other bizarre phenomena that suggest a supernatural presence might be stalking them. With each passing moment, the boundary between reality and the terrifying local legend of the witch becomes frighteningly blurred.