Liu Ruyan's cute reaction in the face of modern technology in ancient times; using ancient chess, calligraphy, calligraphy, Chinese medicine, martial arts, and embroidery to "kill everyone" in the modern entertainment circle or wealthy families, and the misunderstanding of repaying a favor: Liu Ruyan just wants to "give her body to me" or "be a good person" to repay her kindness, but the male protagonist thinks she is a commercial spy or a psycho, and in the end she develops a really good relationship.