The Third Prince of Great Xia has a bizarre thought circuit and unparalleled tactical wisdom, yet his actions never follow convention. Facing enemies in the northern border, he relies on marvelous schemes to force opponents into active peace talks. Returning to the capital, he tosses and turns the crowd of princes and court ministers until they flee in terror. Commanded to travel far to Qingzhou to investigate a case, behind a murder case turns out to be a shocking treasonous conspiracy. He can charge into battle on the front lines, and can also skillfully mediate with clever plans. Encountering the resolute and dashing female constable Nangong Yue, the two bickering enemies join hands to pacify the turmoil in the imperial court and countryside. Not fighting for the imperial throne, seeking only national peace and people's security, he is finally enfeoffed as the Prince of Zhenbei, guarding the northern border mountains and rivers together.