Xiong Xiruo, a talented young painter, has a photographic memory. She was arrested for drawing a comic strip about the secrets of the Li family nobles in Yunyao. While on the run, she took a well-paid order and sneaked into the Li Mansion as a servant to draw a mysterious "Four Arhats". Xiong Xiruo was arranged to be with the legendary brutal eldest son Li Hongbin, and accidentally spent a night with him. Xiong Xiruo tried to escape but was caught. In a hurry, she lied that she was pregnant with Li Hongbin's child. At the right time, Li Hongbin started a fake marriage with Xiong Xiruo to avoid marrying the daughter of the Song family. The happy enemies gradually fell in love with each other day and night. The forces in the Li Mansion had their own ulterior motives and tried to expose Xiong Xiruo's identity. At the same time, the Song family in the capital was eyeing Yunyao and Yuntie, and the Li Mansion was facing internal and external troubles. Xiong Xiruo discovered the secret from the painting task, and joined hands with Li Hongbin to break the conspiracy of the traitors in the clan, resolved the crisis of Yunyao, and the two finally became a couple.