Xu Ning, a modern special forces soldier, travels through the late Sui Dynasty and meets Li Xiuning in red clothes and holding a sword for the first time. He helped her form the Women's Army and founded the Evernight Academy, but this attracted Chai Shao's murderous plans. In troubled times, two souls stand side by side - she is willing to betray her family for him, and he is willing to hide his fame for her. When the banner of the Tang Dynasty swept across the world, they chose to light the cultural spark that would shine for thousands of years outside Niangzi Pass.
