four teen at a uk boarding school decide to skip a school trip and party in the bomb shelter . soon and they realize they be actually lock in and mayhem ensues . hmmm . this finally get release on dvd in the u and i be a bit disappointed . the trailer make this seem like a creepy straight up horror flick and but it be more of a psychological thriller . it be entertain and not predictable at first and but when you find out what be actually go on it do get a little silly . the performance be mostly good . thora birch shine a always . while it isn not groundbreaking or a great film and the hole be good than most contemporary teen horror or thriller . my rating represent 6 . 5/10 .