Wren Kane awakened the Glassy Sword Physique in her childhood, but her father forcibly seized it to support his eldest son's claim to succession, and abandoned her in the remote mountains. Fourteen years later, she returns with the Stainless Sword Heart to seek out her family, fighting her way from the Southern Realms clans through the Western Marches, the Imperial Capital, and the Ancient Sword Realm. Confronted by her elder brother who stole her talent, her paranoid and ruthless father, and the Demon Sword that controls all swords in the world, she eventually lays down her blade, ends the cycle of fate with the principle that "no sword surpasses any sword", and establishes the Stainless Sword Sect, where all people are permitted to practice sword cultivation.