In the Age of Dharma End, spiritual energy has dried up for thousands of years. But there is still something left in the old things - the thoughts of the dead, the nature of the objects, and the Tao carved into them by ancient monks. In the industry, this is called residual spirit. In Nancheng Secondhand Goods City, junior Lu Yu spent ten yuan to pick up a piece of jade from a pile of rubbish. The palm of his hand was heated, and the jade turned into powder, and a memory of the bloody wasteland entered his body. The "worthless" piece that had been kept at the bottom of grandma's camphor box for thirty years was the key that my uncle, whom I had never met, put in - two generations of waiting. Distinguish chapters, interpret volumes, compile books, and archive. From an apprentice stall owner to the only archivist in the city, Lu Yu spent three years reading a thousand years of accounts, and also read the truth about the end of the law: it was not a natural disaster, but a man-made disaster - the ancient monks wanted to preserve spiritual energy for future generations, so they built grain into mouse holes, and seven soul-devouring stones devoured the spiritual veins. The spiritual veins went berserk on the night of the winter solstice, the stall-shaped incense burner at the auction, the one hundred and thirty-seven lists that came out over the past forty years, and the guardian who had been chasing the stone for thirty years. Behind every old thing, there is an unsettled debt. After the stone is sealed, the account must be left behind. He compiled all this into a jade pendant and placed it in the archives on the second floor of the museum. The door is unlocked - things are waiting for someone to come.