When Lin Xiaoman, the female captain of the criminal investigation detachment, met Chen Mo, a relegated criminal profiler, the two experts who disliked each other were forced to team up to investigate a series of serial murders that imitated world-famous paintings. The murderer left incomplete QR code fragments at every scene. When pieced together, they pointed to an unsolved case handled by Lin Xiaoman's mother fifteen years ago. As the investigation deepened, they discovered that all the victims had appeared in an encrypted chat room on the dark web, and Chen Mo's profile report highly overlapped with the characteristics of the real murderer...