Zhao Qingyue, the eldest princess of Dajing, conquered the country but was used as a pawn by her father. The secret guard Ye Chen is as cold as ice and obeys orders. In fact, he is the prince of the Northern Desert, lurking in Dajing just to spy on the military situation. At first, Ye Chen regarded Zhao Qingyue as his mission target, but as she actively flirted with him and protected her from life to death, his frozen heart gradually melted. When the war drums of the two countries beat and Ye Chen's identity was exposed, the two stood on hostile sides. After experiencing misunderstandings and sadistic struggles, he put down the country for her, knelt down and begged for an armistice with the dignity of a prince, and protected her for the rest of her life, and joined hands in a prosperous age.
