Chan, in Paris for a reunion with friends from World War I, becomes involved in investigating the murder of a munitions manufacturer who was supplying arms to the enemy, even as the rising clouds of World War II force the city into nightly blackout status..
| Directing | Herbert I. Leeds | Director |
| Writing | Robert Ellis | Writer |
| Writing | Helen Logan | Screenplay |
| Writing | Gina Kaus | Theatre Play |
| Writing | Ladislas Fodor | Theatre Play |
| Writing | Earl Derr Biggers | Characters |
| Camera | Virgil Miller | Director of Photography |
| Editing | Harry Reynolds | Editor |
| Art | Lewis H. Creber | Art Direction |
| Art | Richard Day | Art Direction |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Herschel McCoy | Costume Design |
