Deep beneath the ruins of post-apocalyptic Moscow runs a network of Metro tunnels, where the remnant of the surviving human race struggles to survive in the face of a deadly threat from both inside and out. Bloodthirsty mutants lurk in dark, underground catacombs, as well as on an extinct surface, where toxic winds rage under the poisoned sky. Meanwhile, the quarreling factions of the inhabitants of the Metro, instead of uniting, plunged into a war for full power, which is to be guaranteed by the surviving military installation in the D6 bunker. Internal conflict is intensifying, which may result in the eventual extinction of the human species. Your name is Artem. Overwhelmed by the weight of guilt but supported by hope, you hold in your hands the key to the survival of our species: the last ray of light in the darkest hour...