The film is set in 1941 during the Second World War, when the city of Benghazi in Italian-ruled Libya was occupied by British forces. Italian inhabitants of Benghazi work to resist the British and discover their military plans. One man, Captain Enrico Berti, appears to be collaborating with the British but is in fact working undercover for Italian intelligence. The film ends with the city being recaptured by Italian troops and their Nazi German allies.

Fosco Giachetti
Hauptmann Enrico Berti / Il capitano Enrico Berti

Maria von Tasnady
Carla Berti

Amedeo Nazzari
Filippo Colleoni

Vivi Gioi
Vivi Gioi
Guido Notari
Bürgermeister / Il podestà italiano a Bengasi
Leo Garavaglia
Dr. Malpini
Laura Redi
Fanny / Maria detta 'Fanny'

Fedele Gentile
Antonio
Amelia Bissi
Mutter / La madre di Giovanni

Carlo Duse
Hauptmann Marchi / Il capitano Marchi

Fosco Giachetti
Hauptmann Enrico Berti / Il capitano Enrico Berti

Maria von Tasnady
Carla Berti

Amedeo Nazzari
Filippo Colleoni

Vivi Gioi
Vivi Gioi
Guido Notari
Bürgermeister / Il podestà italiano a Bengasi
Leo Garavaglia
Dr. Malpini
Laura Redi
Fanny / Maria detta 'Fanny'

Fedele Gentile
Antonio
Amelia Bissi
Mutter / La madre di Giovanni

Carlo Duse
Hauptmann Marchi / Il capitano Marchi