In the distant future, humanity survives inside a gigantic megastructure that expands endlessly, shaped by automated systems that have long since fallen out of control. Killy, a solitary man with extraordinary resilience and a devastating weapon, travels through this labyrinthine world in search of a human carrying the Net Terminal Genes, a genetic trait that could make it possible to regain control of the network governing the City. His journey takes him across immense levels inhabited by isolated humans, artificial creatures, and hostile security systems. As he moves deeper into the structure, Killy discovers a world where architecture, technology, and survival have overtaken nearly every trace of civilization.