Chen Yu, a geology student, accidentally transmigrates to the Western Zhou Dynasty, where he discovers that he has an immortal body and supernatural lightness skills. From slave to general, he lives through millennia of reincarnation, witnessing the decline of the Zhou royal house, the Warring States era, and the rise of the Great Qin. He takes wives and concubines, forms the Shadowless Guard, and builds a mechanical city, yet watches his loved ones grow old one by one under the curse of immortality. When he meets Ying Zheng, the brutal and suspicious King of Qin, the course of history begins to shift. To bring the age of chaos to an end, Chen Yu has no choice but to raise the banner of rebellion. From general to emperor, he ultimately uncovers the mystery of his immortality: he is an “observer of time and space,” chosen by an alien civilization. This is an epic spanning a thousand years, blending history, fantasy, and political intrigue to tell the story of an immortal who struggles, rises, and seeks redemption in the river of time.