A British officer poses as a traitor in order to infiltrate a team of terrorists who are sabotaging ships, while a seductive cabaret dancer is working for the mysterious genius who runs the enemy spy ring.

• Gregor Rabinovitch
• Viviane Romance
• Roger Duchesne
• Erich von Stroheim
• Abel Jacquin
• Yvette Lebon
• Jean Périer
• André Roanne
• Philippe Richard