The unexpected discovery of an ancient sword box deep in the cold pond broke the sixteen-year silence of Mu Yun, a handyman disciple of the Taiyi Immortal Sect. When the sword spirit Xuanli awakened from the sapphire sword box, the nine sword energy rushed straight into the sky, which not only alarmed the ancestors of the sect who had been in seclusion for hundreds of years, but also caused the nine-obsidian star map to reflect the sky - the spiritual energy tide that cycled for three thousand years actually surged a hundred years in advance.
The young man with Hunyuan spiritual roots and a dragon-shaped birthmark has since broken through the cage of fate. Deep in the Shiwan Mountain, he and Su Yingxue, the chief of the Medical Immortal Valley, explored the altar of the witch clan and witnessed the screams of blood when the monsters transformed. In the secret realm of Guixu in the East China Sea, he deduced Zhou Tianxing with Nangong Yue, the true legend of Tianji Pavilion. Rail, to reveal the world-destroying prophecy sealed in the bloodline of the Mermaid Princess Lan Yi; while the soul-eating blade held by Leng Qianjue, the saint of the Nine Nether Demon Sect, at his throat, turned into a karma-fire red lotus that cut through the inner demons at the time of life and death.
Twelve innate spiritual treasures reappeared in the world, and the celestial phenomena of nine stars tore apart the barriers of the three realms. When the demon god's broken body stood up from the end of the River Styx, Mu Yun knew that the Taichu Sword Box in his hand was actually a god-killing weapon forged by the ancient sword sect with the life of Ju Sect as a sacrifice. In Xuanli's gradually resurrected memory, the white-clothed swordsman with a similar face to Mu Yun was pointing the broken truth of the ancient world to the deepest taboo of the dragon-shaped birthmark...