While doing a thesis about violence, Ángela finds a snuff video where a girl is tortured to death. Soon she discovers that the girl was a former student at her college...
- Year: 1996
- Country: Spain
- Genre: Horror, Thriller
- Studio: Sogepaq, Las Producciones del Escorpión S.L.
- Keyword: madrid, spain, kidnapping, research, snuff, psychopath, friends, film in film, murder, serial killer, thesis, psycho, video tape, college student
- Director: Alejandro Amenábar
- Cast: Ana Torrent, Fele Martínez, Eduardo Noriega, Xabier Elorriaga, Miguel Picazo, Nieves Herranz