Younger brother Shen Fang and older brother Shen Lin reunited in Nanjing after the victory in the Anti-Japanese War. On the surface, Shen Fang is a military hero who has returned triumphantly, but in fact he is an underground love worker of the CCP. As an official of the Central Committee of the Kuomintang, Shen Lin has always had doubts about Shen Fang's identity, which puts Shen Fang in desperate situations many times. Not only does he have to face his brother's investigation, he also has to face family troubles, love choices, and the temptations of his "colleagues". His latent work faces unavoidable crises. For the faith in his heart, Shen Fang finally persisted. In the bloody wind without gunpowder smoke, he risked being exposed at any time and used his bravery and wisdom to complete tasks again and again. In the end, when Shen Lin confirmed his younger brother's true identity, the corruption of the National Government and the inspiration of people around him, including his younger brother, made him change his inherent position and join the revolutionary camp. During an important mission, Shen Fang died heroically, and Shen Lin took over his mission and continued to fight for the revolutionary cause.
