The scholar Ning Caichen (Leslie Cheung) failed to collect debts and had nowhere to go, so he stayed overnight at the ghost temple Lanruo Temple, where he met the knight Yan Chixia (Wu Ma), and the two became neighbors. One day, he met the beautiful girl Xiaoqian (Wang Zuxian), and the two fell in love with each other, but Xiaoqian was a ghost controlled by the tree demon Lao Lao, who specialized in confusing strong men to absorb Yang energy on behalf of Lao Lao. Xiaoqian saw that Ning Caichen was kind-hearted and could not bear to harm him, and her feelings for him gradually deepened. Ning Caichen wanted to save Xiaoqian from Lao Lao's clutches, but because Lao Lao was so powerful, Xiaoqian could not escape from her clutches. The two then asked Yan Chixia for help...