When the night gate was broken, the Northern Barbarian King took off his mask, and Ye Jinghong's spear crashed to the ground - that was the person to whom she had given her heart. Back then, she was disgusted with the palace arrangements, disguised herself to win her own martial arts competition, and got to know him; later, she and he traveled across the mountains and rivers, watching the morning frost and night moon together, and he blocked swords and made plans for her. But now, he came as an enemy and crushed not only the city, but also the countless days and nights they had walked side by side...