In ancient times, Emperor Jun of Heaven and Queen Mother of the West met and fell in love on the top of Kunlun. Emperor Jun married another clan in order to stabilize the heaven, and the despair of the Queen Mother of the West breeds obsession in her heart, giving birth to the inner demon of the Golden Mother. He planned a ten-day catastrophe in the sky and united with the demons to attack on a large scale, causing the destruction of all living beings in the world. Emperor Jun led ten demon commanders to fight against him, and used the Sun Sword to imprison the source of the inner demon in the Kunlun underground. He also buried the natal divine weapon, the Guangyue Zhenyue Sword, deep in the Qinling Mountains to isolate the demonic energy and protect the mortal world.
Three thousand years have passed, and the seal of Kunlun has become increasingly loose. The inner demon of the Golden Mother has gradually awakened, and she sent Di Jiang to massacre the Luochen Village where the sword was guarded. The young Tianhun witnessed the death of all his relatives and neighbors, and his soul was seriously injured and on the verge of death. Bai Ze took him into the Wuyou Secret Forest. Tianhun relied on his own stubbornness and pride to conquer Ruomu Yizhi against the odds. Bai Ze made an agreement with him: Tianhun traveled all over the world to sharpen his heart, and only when he defeated himself at Chuanyunguan could he get back the Fuguang Zhenyue Sword.
After leaving the secret realm, Tianhun entered the mortal world for the first time, and Fengli Town met Xin Jiuer, who was hiding in the Fox Clan. The girl secretly robbed the rich and helped the poor, and the two experienced life and death crises and developed feelings for each other. They also met Ling Shuangjin, and the three of them headed west together, passing through dangerous situations and getting a glimpse of the demon clan's deep layout.
Along the way, they witnessed the pain of separation, the displacement of the people, and the shackles of fate. Tianhun gradually saw through the root cause: the evil disaster originated from the entanglement of ancient love and calamity. In addition to Dijiang, the three great demon kings Qiongqi, Yaozhu, and Zhu Jiuyin have appeared one after another. The demon clan's adviser Wudu Zhimo has calculated all the people's hearts and laid layers of traps one after another. The battle at Chuanyunguan is imminent. He and his companions worked hand in hand to uncover numerous conspiracies, fight against powerful demon enemies, settle three thousand years of grievances, and protect the people of the world.