The story tells the story of how the unfavored prince Gu Yuntang rose up step by step and finally ascended to the throne by virtue of his wisdom and forbearance in the turbulent palace. He and Lu Qingwan supported each other and faced the palace's conspiracies together; he and the emperor Xiao Ji's brothers staged a battle of power and family affection; he and the Queen Mother Qin Muyao battled wits and courage, uncovering the shocking secrets hidden deep in the palace. In this process, Gu Yuntang experienced betrayal, sacrifice and growth, and finally completed the transformation from prince to emperor, and deeply realized the cruelty of power and the complexity of human nature.