The north belongs to Northern Xinjiang, the south is called Nanqin, the east is called Dongwang, the west is the Western Regions, and the middle is the Central Plains. Qingcheng is the sister of the Emperor of the Central Plains, the supreme Princess Qingcheng. The emperor's treatment of her was good and bad, and it turned out that he was afraid that it would turn into an unfaithful love affair. The stunning dancer from Prince Ruian's Palace, the selfless King Ruixian, and Princess Yingyun looking east, three people search for Qingcheng's true identity. It turns out that she is actually the lost princess of Southern Qin! A shocking conspiracy is brewing, and the four green kings are ready to take action. The Southern Qin Dynasty has been destroyed. Looking to the north and east, the Three Kingdoms in the Western Regions are approaching fiercely. During the war, confidential information is leaked. Who is the spy? The target is pointed at Princess Qingcheng. Who was responsible for the fire in Southern Qin ten years ago?