This suspenseful psychological thriller features hot young stars Thora Birch (GHOST WORLD, AMERICAN BEAUTY), Desmond Harrington (GHOST SHIP), and a hip, edgy cast! When Liz Dunn (Birch) and three of her prep school friends decide to bail on their scheduled weekend field trip and hide in a long-abandoned bomb shelter, they expect to party and hang out. They don't expect someone to lock them in! As anxious hours turn into desperate days, fear and insecurity erupt uncontrollably as their spontaneous adventure turns into a bloody fight for survival! Also starring Keira Knightley (PIRATES OF THE CARIBBEAN: THE CURSE OF THE BLACK PEARL, BEND IT LIKE BECKHAM) and Embeth Davidtz (THE EMPEROR'S CLUB, BRIDGET JONES'S DIARY) -- you'll find yourself bolted to your seat as the electrifying tale unfolds through Liz's tormented eyes!