Lin Yan, a graduate student in the Department of History, awakened his talent for "historical empathy" and was recruited by the secret organization "Eye of Truth" to become a historical revisionist. He traveled through twelve dynasties and uncovered the truth that had been tampered with by power: Qin Shihuang's burning of books was to encode the unification of his thoughts, Wu Zetian's inscription on the empress' will was hidden, and Zheng He's voyages to the West were the layout of an intelligence network... Every time a piece of history is revised, reality will change simultaneously. When he discovers that the same hands are behind all the corrections, he faces the ultimate choice: expose the "white lie" that continues civilization, or become a new guardian?