The year is 2033. The world has been reduced to uninhabitable rubble and only a few score thousand survivors live on in the Moscow Metro - the biggest air-raid shelter ever built. It is a world without a tomorrow where feelings have given way to instinct - the most important of which is survival. But now a new and terrible threat has appeared and it is up to one young man to alert everyone. He holds the future of his the whole Metro in his hands and maybe the whole of humanity as well.