In order to stabilize the dynasty, the eldest princess Xiao Jinglan was forced to marry Gu Yunshen, a well-known dandy in the capital, and became a laughing stock. She originally thought that she would be stuck with a loser for the rest of her life, but little did she know that this marriage was a tacit chess game between the two. They tried the game in the deep house and joined forces to break the game outside the court. It wasn't until the night of the palace coup, when the prince-in-law showed his strength for her in front of thousands of troops, that she was shocked to realize that she had not only picked up an ally, but also a destined person who could entrust her country and her true heart.