One hundred years ago, Min He, the leader of the Lieyan Clan, launched a riot in an attempt to seize the emperor's blood and control the Xianglong Dynasty. The princes from all sides then proclaimed themselves emperors and became independent. Long Qin, the Emperor of the Xianglong Dynasty, used the blood of the emperor to activate the protective shield and saved one third of the dynasty. Yao and Wu were ordered to protect the emperor's bloodline and establish the Kingdom of Tianhai. With the protection of the Guardian Shield, Tianhai Kingdom has been resting and recuperating.
However, a hundred years later, Min Hyuk launched a war again...