Canadian Mountie Steve Wagner captures a German Luftwaffe officer on a spy mission, who later escapes from the prison camp. To catch the spy ring, the Mounties employ a ruse so that the spies, believing Steve to be sympathetic, enlist him in their plans.

Child bride Claudia Naughton has made life difficult for her husband David because she can't stand living so far away from her mother. She's also afraid her husband doesn't find her desirable enough. To remedy both situations, she sells their farm to an opera singer so they'll have to move back to the city near her mother, and she tries to make her husband jealous by flirting with a neighbor. Eventually, Claudia has to learn to grow when she discovers that she's about to become a mother and that her own mother is gravely ill.

Sergeant Joe Gunn and his tank crew pick up five British soldiers, a Frenchman and a Sudanese man with an Italian prisoner crossing the Libyan Desert to rejoin their command after the fall of Tobruk. Tambul, the Sudanese leads them to an abandoned desert fortress where they hope to find water. Soon a detachment of German soldiers arrives and attempts to barter food for water, but Gunn and his followers refuse. When the Germans attack, Gunn leads his desert-weary men in a desperate battle, hoping that British reinforcements can arrive in time.

Merle Oberon plays a Norwegian resistance figure in a small town, married to a Nazi commandant. When his superiors begin to suspect her, the Allies land an assassin to kill him -- an assassin who happens to be her former lover.

The British Army, retreating ahead of victorious Rommel, leaves a lone survivor on the Egyptian border who finds refuge at a remote desert hotel. He assumes the identity of a recently deceased waiter and is helped by the hotel's owner, despite protest from the French chambermaid, who fears the imminent arrival of Rommel and the Germans.