Eleven years ago, in the thirty-second year of the Yuelong Kingdom, the old emperor Qingde, Gusun Youzhi, suddenly suffered from a strange illness, and his life was hanging by a thread. During this period, the eldest prince Gusun Duanrui, who was loved by the emperor, was resisting the invasion of Xiliang Kingdom on the northwest border of Yuelong. As soon as the news came that the old emperor was critically ill, the eldest prince Gusun Duanrui hurried back to Beijing, only to find that the dynasty had already changed. The old emperor is dead, and the third prince, Sun Duanlei, is proclaimed emperor. During this period, various incidents occurred, and I was confused as to how the throne, which was originally the eldest prince's, could be snatched away by outsiders. The new emperor came to power and saw his biggest rival return. Soon after he was eliminated, the eldest prince and his cronies Yue Wenyuan and his family were all killed, and the secret plan in Yue Wenyuan's hands was missing. Eleven years later, the Tianjice crisis quietly started again. In Shili Town, Yue Rong'er, an orphan girl of the Yue family, grew up peacefully, but was accidentally discovered by the prince Gusun Huimu. Yue Rong'er, who has no idea what to do in front of these forces, and what kind of sparks there will be in the encounter with the ancient sun Huimu.