At the end of the Tang Dynasty, Huangfu Dian, the elder of Kunwu Pavilion, felt that the demon tribe was destroying the dragon veins, and led his disciples to fight against the thousand-year-old tree demon. Unexpectedly, the demon's strength greatly increased after absorbing a monster. In order to preserve his strength and reverse the crisis, a little man Li Yuanji and his friends met Chu Linger and Xun Tu and got involved in the contest with the demons. They gradually grew up in the process of confronting the demons, changing the mentality of a petty citizen, and finally making self-sacrifice to save the people, defeating the devil, and becoming desert heroes.