Xiao Jin was originally a rebellious minister and traitor. He killed the king and seized power, staining the palace with blood. However, he was regarded as the wise king who saved the world. He watched the carols spread with cold eyes, but he knew in his heart that the one who really supported the country was Li Zhaoheng who was hiding in the shadows - the puppet he supported with his own hands became a destiny that he could not control. When the iron cavalry trampled the old dynasty, and when the political power was shattered into dust, Xiao Jin realized that he was the sinner who had been tampered with by history, and Li Zhaoheng was the unsheathed Long Yuan.