Laura, 25, is participating with her friend Harry in a LARP (an acronym for Live Action Role Playing game), where the participants play the survivors of an atomic war, and have taken refuge in the bunker of Monte Soratte, near Rome. During a break in the game, the organizer Gregorio reveals to his lover Laura that he is focused on preparing a new, scary LARP. Shortly afterwards, however, Gregorio mysteriously disappears. Laura doesn't know what to think. Is it possible that he is putting the lives of the participants at risk? Or did something bad really happen to him? After a few accidents, the game is interrupted and the few players that remain decide to look for Gregorio in the immense, dark spaces of the bunker.
