Dong Hu, a young girl living in Xuanwu, the northern capital of Gogao, dreams of becoming the personal herbalist of the mysterious beauty "Leishi" whom she met when she was a child, and pretends to be a boy to learn medical science. However, when she is suddenly summoned to the lord's mansion, she is told that she is the daughter of the missing lord, and is ordered to join the emperor as a princess. Dong Hu enters the palace and tries to make the emperor dislike her, but the medicinal steamed buns she prepared disguised as a doctor become the emperor's favorite... A queen and a doctor! A fantasy in which one person plays two roles!