At the end of the Daqian Dynasty, there was a bloody storm in the world. Sixteen-year-old boy Zhao Wuji witnessed his parents' tragic death by the "Shadowless Needle" and fell into a cold pool while fleeing with his sister. In a desperate situation, he accidentally ate the ice soul jade cicada to survive, and was accepted as a disciple by the hidden master "Blood Hand Human Massacre" Xiao Zhantian. After six years of hard training, he perfected the "Hantan Sword Technique" in the impact of the waterfall, but his body with three yin and severe meridians posed the hidden danger of practicing evil skills.
When Zhao Wuji first entered the world with a broken-edge heavy sword, the appearance of half a black iron order triggered a fight between all parties. He and the mysterious woman Su Ruoxue secretly fell in love while the swords were fighting, but he didn't know that the other party was closely related to the truth about the family's destruction. As the fragments of the "Nine Transformations of Promise" surfaced, he was pursued by Nangong Ling, the head catcher of the six sects, and Murong Fu, the "Jade-faced Shura", was pressing closer, and he was involved in a bigger conspiracy - the massacre of the family was actually the royal family's plot to lure out Xiao Zhantian.
Awakening the first transformation in the secret realm of Kunlun, exploring the origin of blood in Yingzhou of the East China Sea, cutting off the Tianzhu on the top of Buzhou Mountain... Every time Zhao Wuji breaks through a transformation, a strand of silver hair will be added, and his red eyes will reflect the blood of the rivers and lakes. When the ultimate martial arts was accomplished, the curse of Tiansha Lone Star also reached its peak: loved ones died one after another, loved ones fell off a cliff and their lives were uncertain. Even Nangong Ling, who was both an enemy and a friend, fell under his out-of-control sword.
Should he defy fate and change his fate to become the supreme martial artist, or should he cut off fate and save the common people? When the heavy sword broke and reshaped for the third time, Zao Wuji stood on the top of the Tianzhu, looking at the collapsing rivers and lakes under his feet, and finally understood that the sharpest edge was never the sword, but the human heart.
