施特劳斯（Fernand Gravey 饰）热爱音乐，将音乐当做毕生的理想，然而，现实是残酷的，为了生计，他不得不坐在办公室之中，为老板打工。因为上班开小差写曲，施特劳斯遭到了解雇，然而，女友波蒂（路易丝·赖纳 Luise Rainer 饰）成为了他最坚实的后盾，在波蒂的帮助下，施特劳斯来到了咖啡馆，在那里演奏自己的作品。
一次偶然中，施特劳斯邂逅了当红歌星卡拉（米莉莎·科耶斯 Miliza Korjus 饰），卡拉的存在激发了施特劳斯的灵感，令他创作出了许多不朽的名曲。波蒂对于施特劳斯和卡拉之间的关系充满了嫉妒，但是，当她看见他们两人在一起珠联璧合的美好景象之后，接受了现实，而卡拉则感动于波蒂的高洁品质，选择了离开。

In 1941, the British Admiralty is worried about the large number of Allied ships being destroyed in the Pacific Ocean by a mysterious enemy vessel. Initially, British Admiral Russell suspects that a German submarine is the culprit. However, the few revealed pieces of the mystery puzzle rather point to a German Navy surface warship.The British don't know it yet but the enemy ship in question is the German Navy raider Atlantis commanded by Captain Reger.His success in sneaking upon unsuspecting enemy vessels is due in large part on Atlantis' ability to disguise itself in a benign, non-combatant, neutral ship.To achieve this ruse, the Atlantis uses props, camouflage, paint, fake foreign flags and even theatrical costumes for its crew to make itself appear something it's not.When Atlantis is close to its prey, it reveals its true identity and opens fire sinking the duped victim. Finally realizing the truth, British Admiral Russell decides to set traps in order to persuade Atlantis to ... Written by nufs68