剧情简介：
大革命时期，知识青年金公寿(饰)、顾大明(杜饰)、杨如宽(杜饰)、于鸿逵(刘冠雄饰)因不同原因离开家乡，相约在济南结拜为兄弟。 很快，由于出身和信仰的不同，他们走上了不同的道路，期间还结识了谢慧(王贝饰)和刘芬(吴慧明饰)两位女同学。 北伐战争的胜利召唤他们来到武昌。金公寿等人考入中央军事学院，在那里师从共产党员赵(史进饰)，而于鸿逵则投奔国民党参谋薛()去了。 四一二反革命政变后，国共分裂，蒋介石大肆杀害共产党人。“马日事变”爆发后，金公寿和已加入共产党的顾大明为解救身负重伤的赵小姐而闯入敌营，并听从赵的教导回武汉找党，而于洪奎则在大革命的浪潮中彻底向敌人投降。......
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