1914年，英国正面临德军的进攻。鲁德亚德•吉卜林热爱国家，想尽一切办法要让自己17岁的儿子杰克（丹尼尔•拉德克利 饰）加入军团，为国家出一份力。可是有深度近视的杰克体检时遭到多次的拒绝，鲁德亚德用尽了自己的关系，希望能把儿子送到军队去。
杰克成功了，他加入了军队。纵使他本身近视这一缺点让他有点不如别人，可是他也努力克服了困难，更成为了中尉，带领属于自己的队伍。
正当杰克要步入18岁，他也正式征战沙场了。而英国的战况明显不及敌人，即使满腔爱国激情的杰克冲向敌方，但他还是抵不过无情的枪林弹雨……

In the seventy two hours leading up to D-Day, all the pieces are in place except for one key element – the British weather. Britain’s chief meteorological officer James Stagg is called upon to deliver the most consequential forecast in history, locking him into a tense standoff with the entire Allied leadership. The wrong conditions could devastate the largest ever seaborne invasion, while any delay risks German intelligence catching on. With only his trusted aide Captain Kay Summersby to confide in, and haunted by a catastrophic D-Day rehearsal, the final decision rests with Supreme Allied Commander Dwight D. Eisenhower. With only hours to go, the fate of the war and the lives of millions hang in the balance.