In the near future, ten thousand survivors live in a huge bunker, 144 floors deep. People believe the world is dead, the air outside is poisoned, and going to the surface is fatally dangerous. All information they receive comes from gigantic screens, on which images from external cameras are transmitted. Day after day, gazing at the lifeless gray landscape, the inhabitants obediently submit to established rules, the main one of which is never to leave the bunker.