The nature of the sound suggests that long before the machines came, the cities began folding in on themselves, torn apart by their inhabitants, who blamed their rulers for the grey, smoggy skies, their lives of neon lights, the never-ending hikes in prices, the degrading living conditions. But beyond the apparent deadness of the city, something stirs in the connected tunnels below the surface. A new form of life arises, something without the confines of flesh, something more robust, able to survive in the hostile, poisonous environment that humankind has left behind.