The Halloween ban is now lifted in Helen's Valley, and the sorority girls of Gamma Tau Psi place Michelle in charge of their annual haunted house. Unfortunately for Michelle some uninvited trick or treaters from her past come knocking.

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".