On Halloween night, a college student named Natalie (Amy Forsyth) returns home to visit her childhood best friend, Brooke (Reign Edwards). Brooke and her roommate Taylor (Bex Taylor-Klaus) convince Natalie to join them and their boyfriends at Hell Fest – a night of horror, amusement park rides, games and spooky mazes. Although Natalie is reluctant to go, she eventually agrees.

Once the group is at the event, they learn that this isn’t just a simple night of silly scares. There’s a masked killer on the loose who takes advantage of the horror atmosphere and uses the park as his own personal hunting ground, murdering people in plain sight. Unsuspecting patrons believe it’s all a part of the show, even as the man focuses his murderous spree on Natalie and her friends. Now the group must fight to evade the masked assailant and his relentless slaughter on the one night in the year when people can’t tell what’s real and what’s for the show.