In the fictional dynasty "Qianyuan", the emperor is old and frail, and undercurrents are surging in the court. The fourth prince Xiao Ce, on the surface, is as gentle as jade, but in fact he is cautious at every step. In order to seize the throne, he deals with various forces, uses them, and even sacrifices his own feelings. Lu Qingwan, as the daughter of the Taifu, originally wanted to assist Xiao Ce to achieve great things, but was forced to change after her family was involved in a power struggle. Zhao Yi, the commander of the Forbidden Army, has a bloody feud. While secretly protecting Xiao Ce, he is also investigating the truth. Concubine Ning, Gu Mingyuan, Eunuch Li and other characters, each with different purposes, are involved in this whirlpool of power. The story takes Xiao Ce's growth as the main line, showing how he gradually moves towards the position of emperor in the struggle for power, and the distortion and struggle of human nature in the process. Through multiple story lines, the story shows the power struggle within the palace, reveals the truth behind power, explores the corrosion of human nature by power, and shows how characters from different classes survive in the power struggle. In the end, although Xiao Ce successfully ascended the throne, he paid a huge price and became a lonely emperor. The story reminds the world that power is a double-edged sword that can make a person successful or destroy a person.