本片讲述的是苏联卫国战争时期，一对相恋的年轻军官为了国家利益英勇献身的故事。苏军大尉别洛夫率领自己的侦察小队捣毁了德军的补给火车，他们在返回途中解救了被德军俘虏的扎罗夫将军。别洛夫的恋人奥莉加是一名久经沙场的狙击手，她正在紧张地培训新兵。回到营地不久的别洛夫来不及与恋人告别，就赶赴新的任务地点。别洛夫被调去担任扎罗夫将军的卫队长，负责将军的人身安全。因为扎罗夫将军负责破译德军密码的工作，所以他是德军伞兵和狙击手射杀的目标，并且司令部里还有内奸。不久，奥莉加在别洛夫的推荐下也被调到司令部担任狙击手，负责将军的安全。两位年轻人并肩战斗，多次化险为夷。
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