Lin Yu is like someone chasing the light in the darkness. He navigates one eerie, terrifying case after another: the strange laughter echoing from an abandoned psychiatric hospital, mysterious words written in blood on an empty street at midnight, and bizarre shadows that keep flashing through a century-old mansion. All of them fall within his investigative reach. With keen insight and extraordinary deductive skills, Lin Yu unravels the clues and searches for the truth. Every step is shrouded in suspense, and every discovery sends a chill down your spine. Amid layers of fog and fear, he must expose the mastermind lurking behind it all.