When screenwriter Shen Qingci embroidered the missing child's DNA into the buttons of her cheongsam, she never imagined that she was burying a double-edged sword. National security agent Jiang Yanzhou wore special AR glasses and captured the secret of the buckle pattern in the ash mist of "The Spies of the Republic of China". Player Zhou Xiaotang triggered a hidden mission due to a wrong choice and accidentally photographed key evidence. When the murderer imitates the script and commits the crime, millions of players become "civilian detectives" through the game mechanism and share clues. In the web woven by technology and tradition, Jiang Yanzhou and Shen Qingci joined hands to turn the cultural entertainment venue into an outpost of crime prevention. The "immersive justice system" they jointly established makes every game choice a glimmer of light that illuminates the darkness.