Shen Mo, who used to be a cold-faced lecturer at a mysterious school, is now a recluse in the city. A serial case that disappeared silently awakened him from his self-imposed exile. Entrusted by the widow of his deceased friend, he stepped into the foggy old time to pursue the truth lost between reality and fantasy. Behind every case, there are hidden shadows of human nature and conspiracies of knowledge. The clues are like fragments of ancient books and need to be analyzed with a calm mind that has insight into everything. Shen Mo is not just a simple case solver, but also a seeker entangled with his own past and beliefs. The truth may not save you, but caught between lies and silence, he uses loneliness as a blade to try to cut through the invisible darkness. The novel interweaves mystical theory, philosophical investigation and the undercurrent of the times, creating a profound journey in which reason and emotion coexist, and the soul and mystery resonate.