Aels, a rich and tempermental woman from the North, moves to Hamburg. She lives in a mansoin besides the newly married couple, Alrecht and Octavia. The friendship between Aels and Albrecht does not disturb the harmony of this marriage. But soon, Aels has a reoccurrence of a tropical disease, and because she is confined to bed, Albrecht rides by each day on his horse to her window and inquires as to her health. When, eventually, he gets sick with an epidemic, his wife takes over this dear service and greets Aels in her riding clothes, pretending to be Albrecht and comforting the sick woman, so as to not worry her about Albrecht also being sick. Aels, however, is not completely fooled and ends up dying of a broken heart. It turns out, she cannot live without Albrecht's love -something Albrecht only finds about from her last letter to him before her death.

Immensee: ein deutsches Volkslied (Immensee: A German Folksong) is a German film melodrama of the Nazi era, directed in 1943 by Veit Harlan and loosely based on the popular novella Immensee (1849) by Theodor Storm. It was a commercial success and, with its theme of a woman remaining faithful to her husband, was important in raising the morale of German forces; it remained popular after World War II.

1942年，生活在斯德哥尔摩的瑞典籍美国石油商人埃里克•埃里克森突然发现自己上了美国的纳粹合作者黑名单，急于辨白。而这一切是盟军情报机关的安排，意在逼迫埃里克成为间谍，因为他可以方便地进出德国。无奈的埃里克只得就范，他开始公开表现亲近纳粹，甚至不惜伤害最亲密的犹太人朋友坎普尔。朋友和亲人们都疏远了他，但只有坎普尔暗中相信埃里克这样做必有难言的原因。
很快，埃里克就和德国人拉上了关系，并将德国石油业巨头格哈德•奥伦道夫爵士、石油商人奥托•豪兹拉下水，组成一个间谍小组，他的代号为“莱德”。
同时，埃里克与笃信宗教的德国地下抵抗组织成员玛丽亚娜取得联络，乔装成情人幽会，骗过监视的盖世太保，不断将她提供的情报记忆下来后带回瑞典。埃里克与玛丽亚娜为了事业均是家庭不幸，两个人倾心相恋。埃里克虽是谍海新兵，但他沉着坚毅，多次避过危险。
在奥伦道夫的努力下，埃里克获准在瑞典为德国“建设”炼油厂，于是得到了参观德国石油工厂的机会，一次，埃里克与奥伦道夫目睹纳粹绞死罢工工人的场面，被深深触动，开始由被迫工作转向自觉行动。他们的情报使盟军得以准确轰炸，令德国损失惨重。
一段时间后，奥托因病去世，由于密信可能泄露，盟军情报机关决定停止埃里克小组的活动。但埃里克惦念玛丽亚娜，同时也为了取回至关重要的纳粹航空燃料生产情报，他毅然再次前往德国。埃里克一到柏林就被关进盖世太保监狱，并亲眼看到因身份暴露被捕的玛丽亚娜殉难。但他强忍悲痛，咬定自己只是玛丽亚娜的情人，盖世太保没有证据只好放人。
埃里克从格哈德处拿到情报，又前往汉堡销毁奥托的密信，不料被跟随的盖世太保察觉。埃里克机智逃脱，并与汉堡的盟国谍报网取得联系，在地下组织和丹麦百姓的帮助下，埃里克越过边境，经哥本哈根渡过海峡，安全返回瑞典。

1939 film by Hans Schweikart