Movie Story : Laura, a 25-year-old actress, takes part in a live-action role-playing game in which players portray survivors of an atomic war sheltering in a sealed underground bunker. After a series of strange accidents forces the game to stop, the participants head out while the staff stay behind to look into the disappearance of Greg, the game's mastermind. Soon the staff are trapped inside, dying one by one in mysterious ways, and they realize something paranormal is steering a sinister game that becomes a desperate fight for survival.