Synopsis：In ancient times, the demon leader Bull Demon King was arrogant and rebellious, causing chaos in the Heavenly Court. Ultimately, he reaped what he sowed and was reduced to his original form. The Heavenly Lord, showing mercy, spared his life, bestowed upon him a kind heart, and banished him to the mortal world as the human Liu Jiu. However, years later, Liu Jiu's demonic nature and memories were deliberately awakened by a villain. He traveled alone to Kunlun in search of a way to break the curse. Along the way, he met Ye Xiaoxiao, the princess of the Flame Mountain. Through shared hardships, they developed feelings for each other. He also encountered the minor mountain demons Pig Intestine and Dog Thirteen. Chiyou teetered between good and evil several times, nearly causing great disaster. But in the end, evil could not prevail over good, and the conspiracy that had surrounded him since ancient times was finally unraveled.