The morale of So-hyeon, a virgin who dreams of escaping from Joseon, and the crown prince, who must protect his position. During the marriage play, it is the Joseon Dynasty, and as the era is different, women are divided into women and men are divided into men. The behavior a woman must do is determined, and she can only learn basic subjects such as sewing, bridal classes, and cooking ancestral rites. Men go to Sungkyunkwan, gain academics, and there is no limit to their rise to government positions. Sohyeon had to secretly learn what the man was learning. Since I was young, I have been studying on my own in all kinds of ways. Sohyeon's dream is to go outside of Joseon, learn more, and travel around the world. But if you get married, everything goes to waste. Will Sohyun successfully complete her fraudulent marriage and achieve her dream? If you are caught in a fraudulent marriage, you will die! If you don't want to get caught, you have to act with all your might!