When the rich man Chen Guangyao was poisoned in an absolutely secret room, the only key was in his own pocket. This was just the tip of the iceberg of a huge conspiracy. Detective Gao Yuan was forced to get involved in this whirlpool. He faced the murderer who smiled and confessed but challenged "who can prove it?", Faced with the rare blue diamond that disappeared out of thin air in full view of the public at the auction, and even unearthed a bloody murder involving the bones of two generations under the dusty old house. Psychological manipulation in the art gallery, another poisoning at the will reading scene... Every time an "impossible" mystery is solved, the Chen family falls deeper into the huge web of greed and lies. Gao Yuan must move forward in heavy fog, on the edge of the abyss of human nature and desire, looking for the fatal truth concealed by a perfect crime.
