Bai Yuan is a lively and naughty beluga spirit beast in the Tianhe River. He often goes to Han Dynasty to play in the Han Dynasty under the alias of Mr. Bai, and gets acquainted with the young general Huo Yun. At that time, there were severe droughts in the mortal world for many years, and witches were causing trouble, but the heavenly court looked on with cold eyes on the grounds that "the laws of heaven prohibit interference in politics" and allowed all living beings to suffer. In order to save his friends and the common people, Bai Yuan repeatedly violated the rules and regulations, attracting the pursuit of heaven. In the baptism of blood and fire, he discovered the shocking conspiracy behind the rules of heaven: the emperor of heaven is actually a traitor of the Wu clan, trying to absorb the luck of the world in order to achieve a breakthrough. Faced with the suppression of the gods and the death of his friends in battle, Bai Yuan transformed from a stubborn spiritual beast into a guardian in his own right. He used his mortal body to fight against the Nine Heavens, and joined forces with Fairy Qingluan, the Great Witch of the Wu Clan, and mortal soldiers and civilians to finally smash the false heavenly rules, reshape the order of heaven and earth, and leave behind a passionate myth and legend.