In Shangai, the "Green Dragon" threatens to kill Herbert Aboody, a rich exporter, unless he pays him 50,000 dollars. One of Aboody's secretaries calls inspector Wens for help. An amazing fact occurs, Wens kills Aboody and then disappears. What is the key to this mystery?

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Main Cast: Hélène Perdrière, Paul Bernard, Maurice Teynac, Pierre Jourdan, Stanislas-André Steeman, Gilberte Clair, Krisha Duchesne, Ky Duyen, Andrews Engelmann, Robert Lussac

Director: Roger Blanc

Writers: Maurice Griffe, Jacques de Casembroot

Editors: Claude Gros, Jeannette Berton

Cinematographer: Enzo Riccioni

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