Synopsis：Demon hunter Song Dingbo is hired by a rice shop to subdue the donkey demon Ma Lu, whom he then takes under his control, gaining fame. However, Ma Lu escapes. Following him, Song finds villagers tying up a young woman, Xiao Xiao, to offer her to a stone deity idol. Through a twist of fate, he rescues Xiao Xiao and defeats the serpent demon masquerading as the deity. Grateful, Xiao Xiao learns of his reputation and asks him to go to the capital to hunt demons. The three journey together, eliminating various monsters sent by the National Teacher along the way. Xiao Xiao’s true identity is finally revealed: she is the Third Princess, who has long suspected the National Teacher—who spreads rumors and twists the truth at court—of being a demon. She hopes Song will help her destroy him. Song resolves to assist Xiao Xiao, but the National Teacher uses the Tianji Apparatus under the guise of praying for rain, intending to harm the people. After countless trials, Song destroys the Tianji Apparatus, saving the populace. Enraged, the National Teacher creates a barrier, transforms into a flood dragon, and battles Song. Song is nearly killed and Xiao Xiao is severely wounded. At the critical moment, Song risks his life to activate the Four Orders, multiplying his powers, and defeats the National Teacher.