The scene of action embraces Tangier, Toulon and the Mediterranean, where Pierre Fresnay, Rolf Wanka and Kim Peacock, cast as captains of French, German and English boats, respectively, unite to rescue the passengers of a neutral boat that is about to be engulfed in a cloud of poison smoke released by a smuggling ship.
Commander Lestailleur
von Schlieden
Commander Falcon
Claire Lestailleur
Martin
Sailor Jaubert
Doctor Laurent
Journalist
Captain Dulac
Huguenin, second master
Sailor Calas
Little Pierre
Commander of the liner
Henchman
Port doctor
Officer of the Spahis
Admiral
Second of the torpedo boat
Investigating judge
Second mate of the liner
English sailor
Father Blanc