In November of 1942, the French submarine, the "Casabianca,", escapes from German-held Toulon, and, upon joining the Free French forces at Algiers, is sent on a secret mission to Corsica to take two secret-service agents to make contact with the underground there. The agents contact the Marquis resistance forces, and learn they are ready to revolt but lack the needed arms and ammunition. The submarine is sent back to Corscia with the necessary weapons for the resistance-fighters, and also returns with trained troops to assist the resistance forces in attacking the Germans.
Pierre Dudan
as Sgt. Tony Luccioni
Gérard Landry
as Lt. Delac
Jean Vilmont
as Chief Engineer Marac
Alain Terrane
as 'Mistral', tall sailor
Jean Vilar
as Submarine Commandant Jean L'Herminier
Paulette Andrieux
as Maria
Michel Vadet
as Captain Le Gallec
Alan Adair
as Lt. Dudley
Paul Mesnier
as Admiral
Georges Péclet
as
Johnny Marchand
as Landau
Louis Marnay
as
