In 1937, Huangpu officer Shen Mo incarnated as "Yamada Kenichi" and infiltrated the Japanese military agency. He also infiltrated the Kuomintang military command as "Chen Muzhi" and started a twelve-year lurking career in the triple strangulation of the Japanese army, military commanders, and Wang puppets. He met Lin Wanqing, a translator expert, in the beacon fire of Songhu, and stayed together in the code and gunfire. From the catastrophe of Nanjing to the dawn of dawn, he used his life as a spy to deliver key information. With real historical events as the background, high-IQ games and group sacrifices are intertwined to write the legend of faith of the unknown heroes on the hidden front.