As the rainy season continues in Jiangcheng, a seemingly ordinary case of the disappearance of the only son of a wealthy businessman suddenly pulls out a dark and intricate web that spans a hundred years. Su Yue, a female private detective, uses a last-minute letter full of mysterious symbols as a breakthrough point to step into a series of shocking mysteries. She thought she was just tracking down a disappearance case, but she successively uncovered mysterious societies that had been hidden for decades, unjust cases in officialdom in the Ming and Qing Dynasties that were deliberately buried, hidden grievances involving three generations, and a life-and-death game between multiple forces. On the way, she met the unruly independent detective Chen Feng. From testing each other and tit-for-tat, to sharing life and death several times and trusting each other, the two became complementary and golden partners. But as the investigation deepens, Su Yue is shocked to realize that this disappearance case was a carefully planned game from the beginning. The missing person Lin Yu is not an innocent pawn. The revenge of Zhou Yan, the leader of the Shado Club, is only superficial. Undercurrents are surging within the society, and there are third-party secret forces taking advantage of it. Even her encounter with Chen Feng is a foreshadowing of a deliberate arrangement. Behind the symbols are layers of nested codes, and beneath the mystery is a deeper conspiracy. Former old friends turn against each other, trusted people betray, and past scars are uncovered. Every step of reasoning is closer to the truth, and every time you get closer, you are in a dead end. The book is guided by mysterious symbols, with centuries-old secrets as its bones, and the game of human nature as its soul. It is interspersed with dozens of reversals, multiple parallel lines of foreshadowing, and near-death dangers. It peels off the cocoons layer by layer to reveal the secret truth, the conspiracy of the society, and the grudges and entanglements of three generations. It writes a hard-core suspense adventure about justice, obsession, redemption, and bondage. The full text is 100,000 fonts long, and the plot has twists and turns, and suspense runs throughout.