The eldest princess Qingyuan of Dajing has to choose a prince-in-law within one day to avoid getting married. Unexpectedly, she hears the voices of the people and discovers that her childhood sweethearts Su Jingheng and Taifu Xie Qingyan both care about the imperial sister Qingyue. In a desperate situation, the young general Lu Jinchuan, who has broken his leg, is willing to marry her, and the thousand-year-old Xuezhi can help him heal his injuries. Qingyuan chose Lu Jinchuan against all opinions, but was plotted by her mother and Qingyue. In the end, the two joined hands, with Qing Yuan relying on secret lines and Lu Jinchuan relying on force to defeat the marriage conspiracy and Emperor Jue's offensive. After many twists and turns, Qingyuan was named the crown princess, married Lu Jinchuan, and jointly guarded Dajing. The people involved also found their own destinations, which proved that the stability of Dajing came from the passion of the soldiers and the unity of the court.
