Anthropology professor Fu Qin is a firm scientific rationalist. He deconstructed all emotions into data until he "picked up" the ethereal and almost demonic student Qi Yu on a rainy night.
Instruments cannot detect his pheromones, and his songs can collapse data models. Fu Qin regarded it as the most perfect research sample and confidently entered into an observation contract.
It wasn't until Qi Yu became transparent under the moonlight and all scientific methods failed, that Fu Qin discovered to his horror that the person he fell in love with was a mountain spirit that was about to disappear.
In the end, the atheist knelt down in the mountains and fields, burned the books that represented his lifelong belief, and dedicated them to God.