Safecracker Eddie Chapman is languishing in prison on the island of Jersey when the Nazis arrive. An adept manipulator of situations, Chapman convinces the Germans to use him to spy on the British. And when the would-be traitor arrives home, he convinces the English to use him as a double agent -- in exchange for a full pardon.

"Olivia" captures the awakening passions of an English adolescent sent away for a year to a small finishing school outside Paris. The innocent but watchful Olivia develops an infatuation for her headmistress Julie and through this screen of love observes the tense romance between Julie and the other head of the school Cara in its final months.

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.

Now that the world conflict is over, five inseparable wartime buddies swear eternal friendship now to each other. But there's many a slip 'twixt the cup and the lip. Jean becomes a postman, Marcel a boxer, Roger an actor, André a student and Philippe remains what he has always been, a young man of good social standing. Roger, who can't find any role, is introduced through his singer sister Valérie, to Frédo, a shady nightclub owner.Roger soon becomes one of Frédo's henchmen. To make matters worse, he swipes Jean's fiancée, Simone. Marcel, who loses fight after fight, ends up joining Fredo's gang as well. André, who wanted to redeem the faults of his father during the Occupation, gets killed in the Indochina war. Marcel is shot down while taking part in a robbery. In her turn, Valérie is bumped off by an accomplice of Fredo and Roger is sent to jail.

Wealthy American Patricia comes to spend some time at her uncle's place in Paris. While out on her own for the evening she meets pseudo-Russian prince Vladimir in a bistro.