A group of college students, including Marti, Jeff, Seth, and Denise, participate in an initiation rite for their fraternity and sorority. As part of their hazing, they are required to stay in the ominous and abandoned Garth Manor overnight. The mansion is known for the gruesome murders committed by its former owner, Raymond Garth, who killed his entire family before taking his own life. On the night of the initiation, the students find themselves locked inside the creepy mansion, unaware that they are not alone and that someone or something may be lurking in the shadows.

As the night progresses, eerie occurrences begin to unfold, heightening the sense of dread among the group. Initially dismissing the strange sounds and moving objects as pranks orchestrated by their peers, the students gradually realize that the threat is real and deadly. They struggle to uncover the truth about the manor's macabre past while trying to survive the unforeseen horrors that await them. Despite their attempts to stick together and find a way out, the tension and terror increase as they are picked off one by one. The remaining group members must confront their deepest fears and devise a plan to escape before it is too late.