Crime Tracking Deep in the Fog

On a rainy night in Jiangcheng, a bizarre murder occurred in an abandoned warehouse. The woman was tied while kneeling and stabbed through the heart. There was no trace or mark on the scene, just like a precise execution. Chen Mo, a retired criminal police officer, was deeply involved in the unsolved case of a series of missing girls three years ago. He resigned due to infamy and became a private detective, only taking on old cases that the police had no solution to. A replica murder case comes to our door. The techniques, details, and scene characteristics are exactly the same as those of the unsolved case three years ago. Professional sailor's knot, high-altitude steel beam murder, special anti-slip lubricant, no fingerprint DNA residue... The murderer was thoughtful and well-equipped with counter-reconnaissance. He stalked in the shadows to plan his hunt. He also blatantly provoked, manipulated investigations, and threatened from afar. Secret anonymous forums, bizarre murders, buried shady stories in the old city, hidden spies in the police station... One link after another, the fog is thick, and murderous intentions are everywhere. The unsolved case three years ago is deeply regrettable. Three years later, the murderer reappeared and once again massacred the city and declared war. Chen Mo re-entered the game and broke into the serial puzzle set up by the murderer alone. Using his instinct as a criminal police officer, he broke the layout, uncovered lies, and tracked down the real murderer. New accounts and old accounts will be settled tonight. In this life-and-death game of hunting and counter-hunting, who can survive to the end?