The twilight of the Xuanling Empire is sinking. In the past, the dandy in the capital used absurdity to cover up the family's edge, but he could not escape the fate of being demoted to the border. He took off his fine clothes and held a sword to guard the border; the jewel of the family once angrily criticized him for his dissoluteness, and finally ran to the border with a token after the family was wronged. Under the moonlight in the garrison, two swords intertwined to make a decisive decision, and the imperial cavalry crushed the last tender feelings, letting them see clearly that the wind and sand on the border could not bury the blood feud, and the colored glass of the Golden Palace could not shine dirty. From tit-for-tat to life-and-death dependence, this pair of men and women used the rivers and lakes as their blades and the frontier as their armor to set off a storm of subversion against the imperial power. They made the border dust a battlefield and made the emperor's palace their way home. The two swords pointed at not only the throat of the enemy, but also the end of the decadent dynasty.