During the humid and depressing rainy season, a bizarre murder occurred in the New Century Building in Binhai City. Zhou Mingyuan, the CEO of Dingsheng Trading, died tragically in his office. His body surface was corroded by aqua regia, and there was a fatal pinhole behind his right ear. A mysterious crow symbol and a note saying "The greedy crow will eventually be corroded" were left at the scene. Interpol captain Lin Shen led the team to peel off the cocoon and discovered that the deceased was involved in many crimes such as commercial fraud and smuggling, and the suspects had their own agendas - rival Chen Li, mistress Lin Yue, and financial director Zhang Jianjun. Everyone had a motive, but they were full of doubts. As the investigation deepens, the toxicology report reveals the double murder method, the chemical plant explosion that has been sealed for ten years comes to light, the mystery of blood relationship is intertwined with the revenge plan, and the murderer sets layers of traps. Who is the real murderer hidden behind the fog? In this thrilling high-IQ criminal showdown, the truth is far more shocking than imagined.