It's Halloween in 1989 and college student Jackie Blue wants to enjoy a quiet birthday in the midst of a chaotic semester. Her friend Amber persuades Jackie to come to the annual Monster Mash party on campus after her shift at the local movie theater. As murder plays out on the silver screen during the theater's Horrorthon, Jackie begins to fall under a strange spell, all while a mysterious stranger watches her every move. As the night unfolds, Jackie slowly unravels. Everyone around her is turning up dead. Jackie finds herself helplessly trapped as the night comes to a shocking and gruesome end.