Three demonic dragons from the sky escaped and committed evil in the mortal world. The Jade Emperor's sister Yao Ji requested an order to hunt down the three demon dragons. On the way, they met Yang Tianyou, a scholar who went to Taoshan to seek enlightenment, and they got married. When news of the happy event reached the Heavenly Palace, the Jade Emperor was furious, and Guanyin Bodhisattva personally sent an order to earth to urge Yao Ji to return to heaven. At this time, not only had the couple given birth to their son Yang Jian, but Yao Ji was pregnant again, and the whole family was happy. Therefore, Yao Ji refused to return to heaven no matter what. Guanyin Bodhisattva said helplessly that if she disobeyed the order and offended the Jade Emperor, Yang Tianyou and his son might be ruined forever. Thinking of her husband and beloved son, Yao Ji had no choice but to return to heaven in tears. Faced with the separation, Yang Tianyou was helpless and cried and passed out on the roadside. Fortunately, he was rescued by the village girl Liu Yueying and took Yang Jian home to raise him. After Yao Ji ascended to heaven, she was still crushed under the Peach Mountain by the angry Jade Emperor.

More than ten years later, Yang Jian and his younger brother Yang Guang (born by his stepmother Liu Yueying) died in a fight in the school. In order to protect Yao Ji's bloodline, Yang Tianyou tearfully sent Yang Guang to pay for his life and paid tribute to Yang Jian. Knowing his life experience, let him escape. On the way, Yang Jian was instructed by the immortal and after going through hardships, he finally came to Yuquan Mountain to find the real person Yuding and worshiped him as his teacher to learn magic. Master Wang Ding taught him a series of magical skills, and told him that his mother and sister had been robbed by a demon dog and a three-headed dragon in the Kunlun Mountains, and asked him to rescue them.

On Kunlun Mountain, the demon dog and the evil dragon were killed by Yang Jian until their true colors were revealed, and turned into a roaring dog and a three-pointed two-edged sword for Yang Jian to use. Unexpectedly, at this time, Yao Ji and her daughter were escorted to the Heavenly Palace by the giant spirit god. Yang Jian became furious and pursued him to fight. His filial piety moved the Jade Emperor, and he issued an edict to release Yao Ji and her daughter to reunite them.