During the Zhenguan era of the Tang dynasty, under the rule of Emperor Taizong Li Shimin, the government is just and the economy is flourishing, yet rival factions maneuver in the shadows both inside and outside the palace. The protagonist unexpectedly transmigrates into Changsun Yi, the son of Changsun Wuji. At first, he only wants to coast through life and do nothing, but a series of unexpected events gradually changes his mind, and he begins to make his mark on the age.
