The mainland is divided into nine states. There are nine heavens above the nine states, and there is an unknown "ten heavens" above the nine heavens. It is said that it is the nine-layer barrier of heaven and earth set up by the ancient sword emperor with his great supernatural power to isolate the mainland from the demons outside the territory. Thousands of years have passed, the Nine Heavens seal has loosened, the demons have penetrated, and the world has long forgotten the name of the Sword Emperor.
Ye Chen, a young man, rose from his youth, held a broken sword in his hand, traveled ten days, slayed gods and demons, and reversed the way of heaven with a mortal body, eventually becoming a sword emperor.
