A single roll of simple documents unearths the Yuehe shipwreck case buried for forty years, with thirty-six human lives drowned at the bottom of the water. Wen Yan, a talented female official of text collation at the academy, is expelled from the academy without cause and wanders down to Qingxi Town. By chance, she obtains a remnant document from the forbidden pavilion, using reverse collation art to restore the destroyed handwriting and investigate the unjust case. Lu Yanzhi, a forbearing aide holding a broken bone old fan, seeks revenge, spending ten years clearing his father's false charge of colluding with bandits. Their destinies have long been intertwined. The Shen and Gu families monopolize cultural veins and water transport, doing their utmost to cover up the evidence of their crimes. Wen Yan gathers the simple document evidence, publicly puncturing the aristocratic conspiracy, and the Shen clan leader collapses step by step in the face of the truth.