In the ghost market of Luoyang, a bone flute appeared out of the sky. The sound of the flute wept blood, causing corpses to emerge at night and jackdaws to cry mournfully, making people in the city panic.
Young man Di Renjie, along with Li Yuanfang and Ma Rong, entered the situation and followed the traces of cinnamon and the secret signs of crow feathers, only to discover that behind the bone flute was a murder that had not been reported for twenty years. From the soul-calming talisman of Fulong Temple to the secret treasure of the dry well in Yayu Embroidery Workshop, from the puppet controlled by magic to the dark shadow lurking in the dark, clues are nested layer by layer, and the truth becomes more and more confusing - the seemingly vengeful orphan girl is actually a chess piece, the dead black crow has a backup plan, and the bone flute seals not only the innocent soul, but also a shocking conspiracy to overturn the government.
When the stone box is opened, resentment is overwhelming and reversals follow one after another. The young detective uses his wisdom to break the situation, peels off the cocoon in the gloom and treachery, cuts through the darkness with the blade of justice, and finally makes the injustice clear and the soul of the broken flute is put to rest.
