- Three "ancient book thefts" occurred in the municipal library in succession. The stolen ancient books were all seemingly unrelated and unpopular, but Su Qiang discovered that the inner pages of each ancient book had a corner that had been deliberately torn off.
- At the same time, three unknown female corpses appeared one after another in an abandoned factory on the edge of the city. The death conditions were highly consistent with the "sacrificial rituals" recorded in ancient books. Lin Jin was commissioned by the family of the deceased to investigate the case, and the clue unexpectedly led to the library.
- The two were forced to cooperate due to the case, and gradually discovered that behind the theft of ancient books and serial murders, there was a secret organization that had lasted for hundreds of years, and a family grudge that had been deliberately buried.
Intention: Embers burn and roses break the mystery, and the century-old secret is revealed