In a world where spirit roots determine everything, Lin Qi is a servant with no spirit root, a “good-for-nothing.” His only secret is that he can see other people’s “sword bones,” the visible embodiment of a swordsman’s talent. A genius’s sword bone shines with dazzling light, while an ordinary person’s is as dull and gray as a rock. His own sword bone is an empty mirror, able to reflect and contain all the paths of the world. When a gravely wounded Sword Immortal pours a lifetime of sword intent into him and foretells, “The sword in the mirror can slay the gods,” a heaven-defying path quietly begins: one where he can never possess a sword path of his own, yet is destined to merge all paths.