An American scientist is sent by the CIA to East Germany to retrieve a secret microfilm from a Soviet scientist interested in defecting to the West but the Stasi secret police's surveillance complicates matters.

• Rhein Main
• Productions et Éditions Cinématographiques Françaises
• Montgomery Clift
• Hardy Krüger
• Macha Méril
• David Opatoshu
• Christine Delaroche
• Hannes Messemer
• Karl Lieffen
• Uta Levka