Criminal Investigation Diary: Crime Code

On a rainy night, in a demolition alley in the old town of Binjiang, a male corpse huddled in a water-logged corner. His death was strange. The deceased's eyes were wide open, and there was a fingerprint-free utility knife stuck in his chest. The area within three meters of his body was clean, with no footprints, no blood, and no signs of struggle. Even the water on the ground was as flat as a mirror, as if the murderer appeared and disappeared out of thin air. The captain of the serious crime team, Lu Chen, squatted down and ran his fingertips across the cold wall. His fingertips were stained with a very light rosin powder, and his pupils suddenly shrank. In the past three months, there have been three identical "traceless murders" in the urban area. The victims were all people who had had civil disputes but escaped legal sanctions. The only thing the scenes had in common was that they were absolutely clean. The murderer looked like a transparent person, completely wiping out any traces of criminal investigation. The assistant ran over with the report in hand and said in a trembling voice: "Lijun, the last call the deceased made before his death was to you. It was connected for ten seconds. No one spoke, there was only the sound of rain." Lu Chen stood up and looked at the dark rain alley, a chill rising on the back of his neck. This highly intelligent murderer is not committing a crime, but declaring war on him.