Dagu Yamen constable Wang Di Bao investigates the brutal murder of nine people in an inn. Based on the clues from the only survivor, Lin An Jing, Wang Di Bao deduces the criminals came from Lingxi and goes out to track down the murderers. Meanwhile, Cun Qing, the head of the Imperial Household, orders the release of Men San Dao, a former 1st Rank guard to the late emperor, to investigate the spread of rebellion rumors and the theft of a treasure map. (Source: Chinese = Baidu || Translation = AnastasiaWun at MyDramaList)