In the Dayi year, treacherous ministers were in power, the king was fatuous and sought immortality, and the country was in turmoil. On the day Prince Liu Gan ascended the throne, his head fell to the ground silently, shocking the world! The prime minister controls the government, and the murderer points directly at the imperial concubine Zhao An. A family in the Zhao family is accused of regicide, and all nine clans are punished. Zhao Fengheng, Zhao An's adopted son, tries to clear up his grievances and turn the tide.