When Chunshan experienced several demon attacks near the age of 18, he met a demon hunter, Shen Xuan, who gave Chunshan a bell and rang it whenever there was a crisis, and after several crises, their feelings grew deeper and deeper until she became a half-human, half-demon monster at the age of 18, who was manipulated by demonic nature to kill people unconsciously at night. But behind this lies an unspeakable ritual secret in the township of Lixia

The film depicts the love story of a group of college students represented by Sima Chun and Lin Wanqing through the point of view of the beautiful robot, Soybean. From not understanding why she has to give up from loving someone, Lan Tao gradually comes to realize the truth of life herself.