Su Wang is a dirty person.
The lowest level in Chang'an City - they are filled by ex-convicts, have meager salaries, are looked down upon by the government, and are ignored by the common people. Her name is not in the household register, only in a shabby old register: C character 713.
A case involving the disappearance of a Sogdian girl led her into a huge black network that ran from the dark alleys of the West City to the center of the court. Kingo Guards, Minister of Household Affairs, Right Chancellor - there were people on every level who wanted her to shut up. Her only weapons were a copy of "Tang Lv Shu Yi", a measuring ruler, and a half-length of faded red rope around her waist.
Everyone said she was overestimating her abilities. Until she discovered that the missing girls' household registrations all had the same sentence written on them - "In the 23rd year of Zhenguan, he followed his father to the Tang Dynasty." And on the same frosty moonlit night, what she heard in the Zoroastrian Temple was evidence that the rebels were about to tear apart the city of Chang'an.
She had too many debts to pay. And this time, she planned to start collecting money from that smile.
Concept: The theme is the anchor and the plot is the ship. The boat can drift, but the anchor cannot move. Each volume of the book answers the same question: when a person whose name has been canceled tries to defend the word "justice" - what does she have to pay and what will she get?