It's Halloween 1989, best friends Sam and Josh are trying to enjoy what's left of their final Devil's Night before graduating high school. But trouble arises when the two pals and a group of friends take a detour on their way to a rock concert, finding an old abandoned barn and awakening the evil inside. Now it's up to Sam and Josh to find a way to protect their friends and defeat the creatures that lurk within "The Barn".

On a night of teenage partying in the woods, Paige unwittingly sets in motion a chain of events that plunge her into a waking nightmare. Tormented by terrifying and increasingly violent supernatural visitations, Paige starts digging into the past and uncovers a sinister secret, buried for decades. Behind the force that now haunts her is a malevolent entity of unspeakable evil. As its power grows and her friends fall prey to its savagery, can she (or anyone) stop The Poltergeist of Borley Forest?