背景是1937年的西班牙内战。来自美国的大学老师罗勃跟白求恩一样到西班牙帮助当地人民抗击法西斯。他在完成炸火车任务后,被派一项新任务:跟自发组成的游击队联手,炸毁峡谷上的铁桥。他认识并爱上了美丽的玛莉亚。玛莉亚是市长的女儿,但父母均被法西斯杀害,玛莉亚也遭侮辱。在共同理想的催化下,他们相爱了,但罗勃却在这场战斗中牺牲。Spain in the 1930s is the place to be for a man of action like Robert Jordan. There is a civil war going on and Jordan who has joined up on the side that appeals most to idealists of that era -- like Ernest Hemingway and his friends -- has been given a high-risk assignment up in the mountains. He awaits the right time to blow up a bridge in a cave. Pilar, who is in charge there, has an ability to foretell the future. And so that night she encourages Maria, a young girl ravaged by enemy soldiers, to join Jordan who has decided to spend the night under the stars.