In a cave in the mysterious Wumeng Linggu, there is a seal of the ancient fierce sword "Fen Ji" with great power. Legend has it that this sword is enough to make the holder go on a killing spree. When the seal of "Fen Ji" was about to be lifted, a group of men in black broke into the Linggu and brutally wiped out the Han family who guarded the fierce sword. Han Yunxi (played by Li Yifeng), the heir of the Han family, was rescued by Ziyin Zhenren and brought back to Tianyong City. Yunxi, who lost his memory, changed his name to Baili Tu Su and followed the Zhenren to learn swordsmanship. Time flies, and eight years have passed in a blink of an eye. New and old grudges and the evil spirit in his body that is ready to go make Tu Su unable to find a place to stay. In desperation, he had to choose to go down the mountain. In the sinister rivers and lakes, Tu Su, who gradually regained his memory, searched everywhere for the enemy who exterminated his clan. In the process, he met Ouyang Shaogong (played by Qiao Zhenyu), Feng Qingxue (played by Yang Mi) and others. Thus, a series of earth-shaking swordsman legends were staged...