Since the Battle of Zhuolu, Chi You, the leader of the Jiuli tribe, was defeated by the Yan and Huang emperors. Some of his tribes surrendered to the Yan and Huang emperors, and some migrated from north to south. These migrating tribes later gradually developed and expanded, forming the Sanmiao Kingdom. The Sanmiao Kingdom was conquered by three generations of rulers, Yao, Shun, and Yu, and finally perished. However, many of its clans and tribes survived and enjoyed peaceful development for hundreds of years. The story of "King Yalu" takes place during this period. King Yalu was the leader of the Miao tribe. His father, King Hanxi, executed a subordinate who was guilty of beheading. The son of the executed subordinate, after King Hanxi died and his son Yalu succeeded to the throne, provoked a war between Yalu and his two brothers. King Yalu kept his father's teachings in mind, and for the sake of the peace and tranquility of the tribe, he repeatedly gave in to his brother's provocations. In the end, how will the relationship between King Yalu and his brother go?