Secretary Shi Yao spends a night with her drunk boss, Gu Tingchen, and becomes pregnant. To keep her job, she hides the pregnancy. Her morning sickness causes her to make frequent mistakes at work, while Gu Tingchen actively searches for the woman from that night. Ji Xuerou, who has a secret crush on him, pretends to be that woman and repeatedly frames Shi Yao. Sensing something is wrong, Gu Tingchen protects Shi Yao multiple times. Ji Xuerou bribes Shi Yao's ex-boyfriend to make trouble, which backfires and allows Gu Tingchen to see Shi Yao's cinnabar mole, confirming she is the one he has been searching for. Once the truth is revealed, Ji Xuerou suffers the consequences of her own actions, and Shi Yao and Gu Tingchen finally end up together.