Under the centuries-old alliance between the Dayin Dynasty, the imperial power and the four major families checked and balanced each other, maintaining the fragile tranquility of the four borders. Yan Zhao, the iron-blooded young master of the Yan family in the north, Xie Shutong, a gentle strategist of the Xie family in the south, Lu Chi, a brave general from the Lu family in the west, and Su Yan, a calm and wise man from the Su family in the east, are four young princes who guard the border, but are trapped in the power-hungry chess game of the new emperor Xiao Jin.
The war on the border has just subsided, with refugees everywhere, powerful separatists, and remaining forces ready to take action. People's livelihood difficulties and the strangulation of power are intertwined. Xiao Jin took advantage of natural and man-made disasters to secretly lay out killing moves, hoping to deprive the four kings of their military power. The four kings used people's livelihood as a shield to rally people's hearts through disaster relief, quelling chaos, and trade, and adhered to the original intention of the covenant amidst the light of swords.
From the checks and balances of power to co-governance, from court games to overseas expansion, from the life-and-death support of two generations to the passing of the torch between three generations, they used their blood and wisdom to resolve internal and external troubles, govern the country with law, consolidate the people's livelihood, and spread culture. Finally, the concept of "co-governance" was integrated into the blood of the dynasty, creating a legend that spans a century.
