After experiencing the tragic murder on Halloween in high school, Cindy (Anna Faris) and her friends entered college. The happy and leisurely life in college made them gradually forget the horror experience of Halloween. Professor Oldman (Tim Curry), who is keen on supernatural studies, plans to conduct an experiment in a haunted house where a terrorist incident occurred a year ago. He needs people who have had near-death experiences to communicate with the spirits. Assistant Waitou (David Cross) learned about the experiences of Cindy and others, gathered them together, and invited them to participate in a research project on insomnia as bait to get excellent grades. With a playful mood, everyone followed Professor Oldman and Waitou to the eerie haunted house, but experienced an extremely unforgettable and terrifying night...