A female police officer who was unjustly dismissed lurked as a dancer in Shanghai, where the Japanese, French, and concessions intertwined. She obtained intelligence fragments from the upper class by dancing and drinking, and pieced together the "power network" that pushed her into the abyss. But whenever she gets close to the core of the truth, an "old thing" always appears - a posthumous letter, a diary, a relic - these items appear in front of her as accurately as if they have eyes, as if someone is "feeding" her clues. She gradually discovered that the deceased in the murder case had used an extremely concealed "text room" technique to carve the murderer's list into 12 daily objects in his home.
