Four teenagers at a British private school secretly uncover and explore the depths of a sealed underground hole created decades ago as a possible bomb shelter.
- Year: 2001
- Country: United Kingdom
- Genre: Crime, Drama, Horror, Thriller
- Studio: Dimension Films, Cowboy Films, Film Council, Granada Productions, Impact Pictures, Pathé Pictures International, Canal+
- Keyword: jealousy, obsession, falsely accused, claustrophobia, bunker, thirst, group dynamics, bulimia, alibi, supernatural, murder, psychologist, celebration
- Director: Nick Hamm
- Cast: Thora Birch, Desmond Harrington, Keira Knightley, Laurence Fox, Embeth Davidtz, Steven Waddington