In Lamberto Bava's supernatural horror film, two university students, Cheryl (Natasha Hovey) and Kathy (Paola Cozzo), receive complimentary tickets to a mysterious movie screening at a renovated cinema. As the film begins, the audience members find themselves trapped inside the theater. One by one, they transform into ravenous demons, turning the night into a desperate fight for survival. Will anyone escape the demonic onslaught, or will the theater become their tomb?