Her mother died of illness at the age of 7. From then on, she determined to become a doctor and traveled all over the country to practice medicine. However, because of the emperor's order, she married him and began a palace life full of intrigues and dangers. She gave up her vows and freedom for him and was willing to share a husband with others, but she could never win his trust and could not equal his power. After seeing everything clearly, where would she go? He is the proud son of heaven, the best among men, and the future heirloom of a country, but he is haunted by her beautiful smile and searches for her with all his strength. After going round and round, he finds that she is already his wife, but she is also the beloved of his brother. How should he choose between country, brother, and beauty?