In the fifth year of Xining in the Northern Song Dynasty, a remnant of Longyou's Chronicles of unknown origin was publicly burned at the Bianjing Secondhand Book Market. The streets were full of paper ashes heading westward against the wind. Only Yu Zhiwei, the "calligrapher" of the Secret Pavilion, could see: the words in the fire were escaping one stroke at a time.
He used the remaining pages to repair the book, but fell from the repair place into the past where ancient books were preserved. There are posts that have been deleted by historians, rivers that have disappeared in the sea of sand, and a city that only exists in erroneous records. Every time a correct word is corrected, a piece of truth is returned to the fragment; every wrong word is corrected, and the mountains and rivers known to future generations will be rewritten accordingly. The price of entering the world in the book is Yu Zhiwei's own memory.
When the Xihe War was about to break out, the court, booksellers, and visitors from the western border were all looking for the ancient water veins contained in the fragmentary scrolls. Yu Zhiwei and Lian Xiang, who came from a Shazhou book-collecting family, were forced to go together from the Bianjing Secret Pavilion to the Longguan River in Qin, searching for the same erased place name in ancient books. They gradually discovered that what was really being fought for was never a side map, but the power to write for the people of the world.
Thousands of volumes are missing, mountains and rivers are speechless. Some people want to cover up a hundred years with one word, and some people are willing to spend their whole life to make up for the name of the unknown.