During the Northern Wei Dynasty, Hua Mulan served in the army in place of her father and returned as an honorable soldier. Ten years later, Rouran again harassed the borders, and Hua Mulan returned to the battlefield without hesitation. In order to save Tuoba Ao, Hua Mulan fell into the hands of the enemy. In prison, Hua Mulan saw through Kun Peng's devious plot. Kun Peng assassinated the Great Khan and framed Hua Mulan for the murder. To save the innocent, Hua Mulan decided to face Kun Peng in a fight to the death.