The heroine, Chu Xi, is the esteemed Princess Yongyang and the most capable of them all. It is a shame she was born a princess; otherwise, she would be the undisputed heir to the throne. But none of the princes are particularly capable, so the emperor secretly gives her permission to take part in the succession struggle. Xiao Jin, a hostage prince from an enemy kingdom, cares deeply for the people and advocates peace. As he works with Chu Xi, he gradually falls for this princess, strong on the outside but vulnerable deep down. Amid political schemes, there is both calculation and sincerity, and he supports Chu Xi's rise to the throne from behind the scenes…