The protagonist Li Yun is an immortal who traveled to the last years of the Qin Dynasty. He has seen the turmoil in the last years of the Qin and Han Dynasties, seen the prosperity of the Wenjing rule, walked through the territory created by Emperor Wu of the Han Dynasty, and also seen the cruelty of the Three Kingdoms. He has experienced two thousand years of history, and understands that the general trend of history cannot be changed, and he can change the small trends of history in his own way.
