徐仲良的父亲是一个邮递员，同时他也是一个地下党员，有一天他遭到出卖被日本人暗杀了。徐仲良想要为父报仇，也从此走上了革命的道路，在担任他父亲的职业邮递员中，他也一次次遭遇了险情，失去了他很多的同事，周山也是邮递员兼地下党员，神父同情也帮助革命，但他也在这个过程中失去了生命，他第一个妻子在他担任邮递员的过程中也去世了，可是徐仲良并没有对黑恶势力低头，他和埋伏在敌人身边，为我共产党传递情报的苏丽娜一起努力一起完成了很多重要的情报内容传递。其中包括在上海解放的战斗中，徐仲良也传递了很多重要的情报，可是他在当向导的过程中遭受到了敌人的攻击，受了重伤，差点失去了生命，幸好他在这样的环境中把自己锻炼成了一个彻底的革命者

Xu Zhongliang's father was a postman, and he was also an underground party member. One day he was betrayed and assassinated by the Japanese. Xu Zhongliang wanted to avenge his father and embarked on the road of revolution since then. While serving as his father's professional postman, he also encountered dangers again and again and lost many of his colleagues. Zhou Shan was also a postman and an underground party member. The priest sympathized He also helped the revolution, but he also lost his life in the process. His first wife also died while he was working as a postman, but Xu Zhongliang did not bow to the evil forces. Su Lina, the Communist Party's informant, has worked together to complete a lot of important information transfers. Including in the battle of the liberation of Shanghai, Xu Zhongliang also delivered a lot of important information, but he was attacked by the enemy during the process of being a guide, was seriously injured, and almost lost his life. He trained himself to be a thorough revolutionist