Ten years ago, the mother of Princess Feng Ming led the Black Cavalry into battle, only to be ambushed and wiped out. As a young girl, Feng Ming accidentally learned the truth from her mother's former subordinates: the treacherous minister Zhao Wuji had betrayed their military route, while her own imperial father had tacitly allowed the massacre to happen. Ten years later, war once again erupts along the border. Zhao Wuji holds absolute power at court and seeks to surrender territory in exchange for a fragile peace. Feng Ming volunteers to fight and leads three thousand Black-Armored Cavalry soldiers to the battlefield, defending the land with their lives against the steppe cavalry. One by one, her comrades fall as the battles rage on. After narrowly escaping death countless times, Feng Ming finally finds the surviving members of the Black Cavalry. Just as she prepares to face the decisive battle against the steppe forces, Zhao Wuji joins forces with the Red Queen to launch a brutal attack, exploiting the chaos to seize the throne and proclaim himself emperor. Feng Ming returns to the dynasty with an army from the Netherworld.