18th century. Lee Minho is a maid in the castle of the Han royal family. The Hans have a growing crown Prince, Jisung. The castle is surrounded by a wall and a moat. The guards don't let anyone in except the nobles, and Jisung is strictly forbidden to leave the castle, Minho also looked after this. Lee also took the prince to various kinds of activities, such as shooting, horseback riding, and Minho was excellent at all these things.