Lin Xiaoman is an ordinary college student, but because he is born with yin and yang eyes and can see spirits that ordinary people cannot detect, he lives a marginalized life on campus. During an accidental pen fairy game in the dormitory, she accidentally summoned Mo Chen, the sealed successor of the Miao Gu art. Mo Chen is a popular figure on campus. He appears to be the president of the student union, but in fact he is a practitioner of ancient Gu magic and is responsible for guarding the balance between Yin and Yang. The two were forced to form a contract due to a supernatural incident. Lin Xiaoman must learn to control his yin and yang eyes with the help of Mo Chen, while Mo Chen needs to use Lin Xiaoman's ability to find supernatural objects scattered on campus: RP lanterns, Ajie drums, etc. As they get along more and more, the two begin to use each other and develop feelings for each other. However, their relationship faces threats from three aspects: the school beauty Su Ya, who is jealous of Lin Xiaoman's closeness to Mo Chen, the mysterious professor who secretly covets the power of supernatural items, and the elders in Mo Chen's family who oppose his union with ordinary people. When the supernatural incidents on campus intensified, Lin Xiaoman discovered that his fate with Mo Chen had been destined a hundred years ago, and they must face together the ultimate enemy who wants to use supernatural objects to open the gate of yin and yang - Mo Chen's master, a poisonous master who will do anything to resurrect his lover.
