Heaven and earth are the furnace, creation is the craft, all living beings are the fuel, and bones are the firewood. In this world, where people cultivate by stealing the lives of the dead, the strong prey on the weak: that is the only iron law. Everyone pursues the nine boneless bones, convinced they are the divine path to the Tomb of Nothingness. Yet no one has ever returned alive to say what lies beyond that door. Only one youth, who crawled back from a sea of blood and bones, watches this silent sacrifice with cold eyes.