The play tells the story of Xu Zhongliang to the identity of the postman latent, found an important intelligence, and the Kuomintang, the Japanese in order to compete for intelligence and struggle of the story. Zhongliang release because of underground Party member is the postman's father was the assassination of Japanese while walking on the road of revolution and served as a postman delivers information process, he have lost his colleagues, the underground Party member is the postman on Wednesday, lost sympathy and help revolution Father Brown, lost his first wife, except crafty team Xiufen. But Zhong Liang did not shrink back, and with the enemy at the time of the enemy side, Sulina for the party to pass the information to the joint efforts of a good time to complete a variety of important information transfer. In Shanghai Liberation battle, Zhongliang release because when the wizard was hurt badly in the ambush the enemy, Zhongliang release in this environment will be tempered into a radical revolutionaries.