Zhao Qingyue, the Great Jing princess renowned for her beauty, was treated as a pawn by her imperial father. The shadow guard Ye Chen was cold as ice and obeyed every order, but in truth he was the crown prince of Northern Mo, who had infiltrated Great Jing to gather military intelligence. At first, Ye Chen saw Zhao Qingyue as nothing more than a target for his mission. But as she repeatedly flirted with him and risked her life to protect him, his frozen heart began to melt. When war drums sounded between their two countries, Ye Chen's identity was exposed, leaving the two on opposing sides. After enduring misunderstandings and heart-wrenching struggles, he gave up his kingdom for her and, as crown prince, knelt to beg for a ceasefire. In the end, he protected her and gave her a peaceful life, and together they ushered in a prosperous age.