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".

Dead hookers, ice cream laced with marijuana, run-ins with the mob - it's just another average night for Kevin Spilker and his pals. To pass his film class, Kevin is following Eugene around for a day with a video camera and calling it a documentary. When the day is over, the question becomes: Has Kevin made the funniest student film of all time? Or has he made a truthful documentary about the wacky night they had to kill Eugene's abusive ex-girlfriend, Karen?