Six kingdoms vie for dominion over the world, while cultivators seek eternal life. Chen Yuan, a transmigrator who was once the Heavenly Strategy General guarding Qingchuan, lost his memory after a great battle and wandered the mortal world with a rusty sword on his back. A mortal's lifetime is but the blink of an eye to him. Old friends grow old, mountains and rivers change, and only a wooden coffin accompanies him through the long years. When buried memories awaken once more, the sword he has nurtured for hundreds of years will make all the immortals in the heavens bow their heads.