On the surface, Gu Tingyuan is a senior translator at the Japanese military police headquarters in Shanghai, but secretly he is a "sleeper" placed by the military commander in the deepest part of the "Mei Agency". But his golden finger is not disguise, but "contextual tracing" - the ability to trace the writer's true emotions, motivations and even details of the surrounding environment from any written material. Passwords, letters, and command documents were like miniature holographic theaters in his eyes. From a seemingly ordinary birthday message, he sniffed out the real start time of the Japanese army's "Central China No. 1 Raid"; from the sharp strokes of an officer's resume, he traced the faces of spies lurking within the national army. What he relies on is not luck, but the ultimate violent dismantling of a literal detective.
