Wanying Tower

Forty-three years of Wanli, the fifth day of the fifth lunar month. Su Qinghe, the director of Wanying Tower in the capital, found a suspicious line of supplementary writing in the corpse manuscript of the Ministry of Punishment - "Remaining water chestnut fragments between the teeth." On the fourth day of the fifth lunar month, there was no water chestnut to eat in the capital. This line was added by someone after the case was concluded. He lightly swiped the paper with clean water, and the ink stains on the supplementary lines faded away, and five indented words floated up from the depths of the paper fiber—— "Macau·Ling·Zheng." This was the only clue left to him by his master who had been missing for five years. Within five days, Su Qinghe must complete the proofreading and endorsement of all copies of the attack case. He followed the traces on the paper: the torn account books of the medicine shop, the separated iron boxes at Tongzhou Wharf, the names obliterated with thick ink in the White Lotus Sect's roster - every clue pointed in one direction: someone was using files to verify the system, changed his identity three times in twenty-six years, and erased his name from history. From the assault case to the red pill case, from the red pill case to the palace transfer case. A serial crime spanning twenty-six years, a person who has never appeared in the "handler" column of any file. "The crease of paper, ink, printing pen" - the six-character file test method, is the weapon left to him by his master. The murderer is hidden in these files that he personally verified.