When the little princess was born, the emperor unexpectedly awakened the ability to listen to the heart. He learned that the five sons born to the queen were not his biological children. He was furious and executed his liaison ministers and illegitimate children, deposed the queen and made the princess his heir. After that, with the help of the princess, the emperor smashed the conspiracy and purged the court. Fifteen years later, the princess even made plans to defeat the enemy. Eventually, the emperor abdicated and the princess ascended the throne and became the queen.