Based on Agatha Christie's "The Secret Adversary," a young couple looking for adventure become involved in the mystery of a missing woman and an espionage ring.

• Orplid-Film
• Carlo Aldini
• Eve Gray
• Hilda Bayley
• Elfriede Borodin
• Eberhard Leithoff
• Shayle Gardner
• Hans Mierendorff
• John Mylong