This story takes the late Sui Dynasty and early Tang Dynasty as the historical background and tells the story of a generation of secret agents. The story begins in a small fishing village in northern Zhejiang. It describes the protagonist, Yin Jing, who was forced to death by Yu Wenhuaji in Yang Guang in Jiangdu, and the world was in turmoil from then on. In this era of war and chaos, the protagonist's wisdom was cultivated, but his father was targeted by spies in Wagangzhai due to an accident. At the invitation of Tang Guogong Li Yuan, his family was assassinated in Taiyuan, but only Yin Jing survived. Tang Guogong Li Yuan took pity on him. , So he was handed over to Liu Wenjing, a subordinate of his second son Li Shimin. Under the guidance of his master Liu Wenjing, he first planned the Flooded Seventh Army and the Xuanwumen Incident, and then was sent to Wagang to work behind enemy lines, destroying their important conspiracy, and avenging his father's murder...