When Lin Ci opened his eyes, he became the "dead chess piece" placed by the military commander at No. 76, Codenamed "Jingzhe". The beginning is a desperate situation - he died on the line, the code book was destroyed, there were only three bullets left in a pistol, and the Japanese spies were searching for the moles one by one! However, he discovered that he could actually understand the Morse code of all radio stations, and any encrypted frequency sounded like clear code recitation to his ears. Intercepting top-secret intelligence, forging transfer orders, and reverse infiltration, he turned the ten-mile foreign market into his own hunting chessboard. Until he deciphered the puppet government's most secret message, the Japanese general exclaimed: Every step we take is in his plan!