When the little white snake Bai Yaoyao first transformed into a human, she felt ignorant of everything in the world. Zi Xuan, who was cultivating immortals in Jiuxi Mountain, fell in love with Xiaobai. After experiencing life and death, Zi Xuan reincarnated as Xu Xuan, the palace master of the Pharmacist Palace. He met Bai Yaoyao at the Peach Blossom Festival, and after many twists and turns, the two finally became a couple. But Bai Yaoyao stole the immortal grass to save Xu Xuan, which violated the heavenly rules. After recovering from the illness, Xu Xuan recalled the past and rescued Yaoyao alone. Junior sister Leng Ning was jealous of Bai Yaoyao, which led to the birth of a dragon and brought disaster to the world. In order to redeem herself, Bai Yaoyao was suppressed by Qi Xiao under the Leifeng Pagoda, and Xu Xuan was heartbroken...