There is a severe drought in the north. The land is bare for thousands of miles, and food and water are exhausted. The commander-in-chief of the Zhenbei Army died in battle, and his daughter Xiao Lan took over the throne at the critical moment, taking charge of the military power of the three armies as a woman. Without chance or extraordinary power, she relies on what she learned as a child to identify water sources, lead her troops to reclaim wasteland and grow food, maintain morale in the army with iron-blooded military discipline, and even set up ambushes to repel enemy invaders and protect refugees in desperate situations. From the "boudoir girl" who was questioned by the generals, to "Xiao Shuai" who made the entire army surrender based on his performance and allowed the people in the northern border to live in peace, Xiao Lan used his wisdom and blood and sweat to build an indestructible barrier for the northern border in the drought and chaos.
