The story of fifteen-year-old shepherd Gu Xiao, who ran away from his landlord to the mountains. There he met scouts from the People's Liberation Army and helped them find the right path. The shepherd then took part in an important combat operation. For his courage and resourcefulness, Gu Xiao was enlisted into the ranks of the soldiers at the request of the company.

解放初期，东北某地。工程师周昌民（陶金 饰）研制的军工产品引起了境外敌方注意，台湾特务组织派遣白秉忠（韩非 饰）冒充周好友的侄儿混入军工企业，并一度获董厂长（凌之浩 饰）信任。白的到来引起公安部门高度重视，派专人对其进行监视。白伺机窃取保险柜钥匙，石神父（陈述 饰）配钥匙时引起锁匠(傅伯堂 饰)怀疑，既向公安局告发，此事给董厂长敲响了警钟，他责成加强内部保卫工作。不久，白秉忠窃走图纸，并威逼利诱周昌民跟他一起赴香港，此时周昌民已看清了白秉忠的特务嘴脸，他及时向领导作了汇报，并指出白盗走的不过是一份假图纸，真图纸早已转移。特务头子何主教（于飞 饰）遂起杀人之心......

China 1839. Because the British imports of opium into Southern China are creating such widespread medical and economic problems, the weak Manchu emperor Tao Kuang is forced to take action that precipitates the 'Opium War'.

上海某大学女生江玲玉（白杨 饰）寄居在姨母家。抗战爆发后，她不顾家人反对阻止，毅然参加抗日救亡演剧队，到抗战前沿作鼓动宣传。与她同在一起的音乐家高礼彬（陶金 饰）是个热血青年，两人逐渐相爱。演剧队随着战事的发展，辗转来到陪都重庆，表兄周家荣（高正 饰）此时在渝做投机生意并纠缠江玲玉，遭江拒。抗战胜利后，变成“接收大员”的周家荣大发国难财，而结婚后的江玲玉和高礼彬却一贫如洗、捉襟见肘，幸得旧友夏光原（石羽 饰）相助，租了个亭子间栖身。长期的颠沛流离加上营养不良，当教员的礼彬患了肺病，担心国家前途命运的玲玉，不顾身怀有孕，奋笔疾书，揭发“劫收”大员们肮脏的嘴脸，终因体力不支，昏倒街头......