In the autumn of 1941, Jiangcheng, an occupied area. Shen Jingzhe, who appears to be the owner of "Dechang Tailor Shop", is actually an underground intelligence agent codenamed "Nightingale". His mission is to establish a secret radio station in the heart of the enemy and deliver key intelligence. When the Japanese army in Jiangcheng secretly deployed the "Falcon Project", Shen Jingzhe had to find the mole lurking among his comrades in a silent hunt and protect the radio wave connected by life.
