The heroine Chu Xi is the noble Princess Yongyang and the most capable. Unfortunately, she was born a princess, otherwise she would be the least controversial prince. However, there is no outstanding prince among the princes, so the emperor secretly promised her to participate in the battle for prince. Xiao Jin, a hostage from an enemy country, cares about the people of the world and advocates peace. During his cooperation with Chu Xi, he gradually fell in love with this princess who looks strong on the outside but is weak on the inside. There is calculation and sincerity in the plot, and he supports Chu Xi to become emperor behind his back...
