The protagonist, Gu Changsheng, is a tombkeeper of an imperial mausoleum. When the "Red Natural Disaster" came, he became the only immortal in the apocalypse due to his special constitution of "Immortal Body". The main plot revolves around the protagonist's long survival in the apocalypse. The highlight is the coolness brought about by the "time span":
1. Witness: The protagonist will witness the destruction of civilization, the barbaric growth of the new order, and the rise and change of the new generation of civilization hundreds of years later from a first-person perspective. He himself is a living history of the apocalypse.
2. Dimensionality reduction attack: As time goes by, common sense turns into myths, and ordinary skills become unique skills. The protagonist relies on the knowledge and combat experience accumulated from the old era to carry out dimensionality reduction attacks on the new generation of strong men in the end of the world, pretending to be pigs and eating tigers, which is very exciting.
3. The search for loneliness: In his endless life, the protagonist fights against the monsters and sinister people in the outside world, while also fighting against eternal loneliness. He will continue to search for the truth about natural disasters and explore whether there are "immortals" like him in the world. This path of search runs through the entire text.
