美国青年阿姆斯特朗为了搞到一个属于尖端机密的科学公式，假装叛逃到东柏林，不惜干掉他的贴身保镖。经过一番激烈追逐，阿姆斯特朗终于搞到了秘密公式，最后携萨拉飞往瑞典……Professor Michael Armstrong is heading to Copenhagen to attend a physics conference accompanied by his assistant-fiancée Sarah Sherman. Once arrived however, Michael informs her that he may be staying for awhile and she should return home. She follows him and realizes he's actually heading to East Germany, behind the Iron Curtain. She follows him there and is shocked when he announces that he's defecting to the East after the US government canceled his research project. In fact, Michael is there to obtain information from a renowned East German scientist. Once the information is obtained, he and Sarah now have to make their way back to the West.
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