Cindy, a young woman in her 20s, returns to her childhood home after the sudden death of her father. When she arrives, she reunites with her old friends, including her former boyfriend, Jack, and they decide to spend the night in the house together. However, as they stay longer, they begin to notice strange occurrences and unexplainable events happening around them.
As Cindy delves deeper into her father's past, she discovers that he had been involved in a cult that used the house for their sacrificial rituals. The cult had been disbanded years ago, but Cindy soon realizes that something evil still remains in the house.
As the night progresses, Cindy and her friends begin to experience terrifying hallucinations and visions of the cult's sacrificial rites. They soon realize that they are in grave danger and must find a way to escape the house before they become the next victims.
With the help of her friends, Cindy uncovers the truth about her father's involvement in the cult and the dark secrets that the house holds. Will they be able to escape the house alive, or will they succumb to the same fate as the cult members before them?