The subway tunnel stretched ahead of him like the throat of a great beast, dark and endless. The walls were coated in graffiti, remnants of a world long gone, and the tracks below his feet were slick with moisture, the echoes of dripping water reverberating through the underground labyrinth. Jack pulled his hood tighter against the damp cold, his rifle slung over his shoulder, his senses on high alert.
He had been walking these tunnels for days. Above ground, the air was too toxic to breathe, the cities reduced to charred wastelands by the cataclysm that had wiped out nearly all of humanity. The only chance for survival was down here, beneath the ruins, where the last vestiges of human life scraped by in the darkness. But even in the depths, danger lurked.