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?
Unfortunately the movie Mystère à Shanghai is not yet available on HBO Max.
| Writing | Maurice Griffe | Screenplay |
| Writing | Jacques de Casembroot | Screenplay |
| Editing | Claude Gros | Editor |
| Sound | Jean Solar | Music |
| Writing | Stanislas-André Steeman | Novel |
| Art | Aimé Bazin | Production Design |
| Directing | Roger Blanc | Director |
| Editing | Jeannette Berton | Editor |
| Sound | Maurice Thiriet | Music |
| Camera | Enzo Riccioni | Director of Photography |
