Forced to flee due to false accusations of patricide, young Fang Han unexpectedly awakens an ancient swordsmanship heritage on the brink of life and death. With a mission of vengeance, he trains his mortal body to master the highest swordsmanship, forging an indomitable sword soul and an unbreakable sword heart. Gu Han vows to defeat all formidable foes across the myriad worlds, each sword strike capable of collapsing the Nine Hells and ending the cycles of the Great Dao. He aims to reach the pinnacle of swordsmanship and become the invincible Sword Sovereign.