The "era-breaking disaster" suddenly fell, the sky collapsed and the earth was torn apart, words were turned into ashes, classics were reduced to scorched earth, and the accumulation of thousands of years of human civilization was almost wiped out. The survivors degenerated into tribal groups, struggling in the wilderness and deprivation, forgetting writing, history and science, leaving only fragmentary legends lingering around the campfire. Lu Chengyu, an ancient book restorer before the disaster, guarded half of the library in the ruins and firmly believed that knowledge is the fire for the rebirth of civilization; Su Qingyuan, a former doctor of archeology, carried a incomplete map of civilization to search for lost classics in the wilderness. After the two met, they gathered survivors with their own unique skills to form a team of "Book Guardians". They traveled through radiation restricted areas, ruins inhabited by mutated creatures, and tribes of predators hostile to knowledge, just to collect a page, half a volume, and a stone tablet engraved with text. Along the way, some people died to protect the classics, and some left due to differences in ideas. The team was repeatedly tempered in survival crises and tests of human nature. They not only have to fight against the cruel environment of the end of the world, but also awaken mankind's memory of civilization - only by rebuilding the foundation of culture can mankind truly step out of the wilderness and restart the interrupted civilization. This is an epic about survival, perseverance and inheritance, and also a hymn dedicated to the fire of civilization.