In order to win the three-year appointment with Nalan Yanran (Jin Yangyang), the eldest disciple of Yunlan Sect, Xiao Yan (played by Ma Boqian) and Yao Lao (played by Gao Shuguang) came to the snake desert to find the legendary strange fire - Qinglian Earth Core Fire, so as to improve their strength. In the snake desert, they were accidentally involved in the racial struggle between the human race and the snake race. The queen of the snake race, Medusa (played by Xia Ruoyan), was in seclusion for the promotion to Dou Zong, which just gave Xiao Yan an opportunity. So Xiao Yan joined Qing Lin (played by Huang Wen) and Mu Li (played by Li Jiuxiao) to sneak into the underground palace of the snake race. It happened that Medusa was possessed by the absorption of strange fire, and Xiao Yan got the coveted "Qinglian Earth Core Fire" without any effort. Outside the city, the great racial war between the human race and the snake race is being staged... Xiao Yan, whose strength has skyrocketed, shattered the long-planned conspiracy of the snake race. After some arrangements, Xiao Yan embarked on the journey to "Canaan College"...