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A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intell...。描述在1936年的东北，年轻寡妇胡秀芝为夫报仇，参加了抗日联军，被锻炼成一名刚强的战士。在一次完成炸毁敌军列车的任务后，为牵制敌人而把他们吸引到牡丹江畔，指导员冷云不幸牺牲。在日军重重围困下，弹尽粮绝的胡秀芝和她的七个姊妹视死如归，背起冷云的尸体一齐沉没在牡丹江中。。