In ancient times, the Yellow Emperor and Chi You fought for a deer, and Chi You won. He united with the four evil spirits "Chaos", "Taotie", "Ao Rui", "Qiong Qi" and "Qiong Qi", and appointed Yu Cha to form the Yin army to help Chi You massacre the Yellow Emperor's tribe. Fu Xi's son Qiu Yi practiced magic and subdued the five ghosts. , But understands the feelings of ghosts, and pities these monsters. Chaos took advantage of Qiu Yi's sympathy and tried to take advantage of Qiu Yi. In the end, he was betrayed by Qiu Yi, and killed all of Qiu Yi's wife and children. However, before he died, he cursed Qiu Yi to grow old with the sky and experience the warmth and warmth of the world alone.
After the failure of the Battle of Zhulu, Yu Cha was demoted to the underworld to take charge of the cycle of life and death in the underworld, while Chi You was trapped in the Fengdu Hell. Yu Cha was unwilling to accept it and once again recruited the "Four Evils" to come back and massacre the Central Plains. In order to prevent this from happening, the Zhong family hid one of the Four Evils, the most ferocious Ao Rui, in Zhong Tao's body and asked Qiu Yi to tame him. Qiu Yi and Zhong Tao thus embarked on a spiritual journey.