Ying Yao, a young literary man in the 21st century, traveled to the end of Qin Dynasty and became the son of King Xiang of Qin and the younger brother of Qin Shihuang. In order to avoid the palace battle, he became a disciple of Gui Guzi and joined the Ghost Gate Intelligence Organization. Together with his sister Yingyu, friends Shi Lu and Zhao Tuo, he went south to Baiyue Ghost Gate. On the way, they encountered various dangers, but successfully resolved them with wisdom and courage. In the end, Ying Yao achieved great success and became the Nine True Kings; Ying Yao was revered as the Nine True Mysteries. They guarded Baiyue in the south and maintained peace, becoming a legend that has been passed down through the ages.