Nie Xiao Qian, a lonely girl controlled by a monster, accidentally ran into Ning Cai Chen, a scholar who went to Beijing to sit for the imperial exam. Xiao Qian was preparing for a tribute for the demon tree grandmother Lao Lao. After being in good-natured nature, Xiao Qian repeatedly approached Ning Cai Chen and was moved by his innocence. After learning about Xiao Qian's situation, Ning Cai Chen asked Yan Chi Xia to retrieve Xiao Qian's soul, but was blocked by the old Black Mountain demon, and went through a period of tortuous and difficult experience from demon to human..