In a Furthman script that resembled a comic-book narrative, a Soviet pilot-spy Janet Leigh lands her Mig fighter at a USAF base in Alaska, posing as defector. Suspicious, the base commander assigns American pilot John Wayne to play counter-spy. Mutual respect leads to love between the two aviators and when Leigh is denied asylum, Wayne weds her to avoid Leigh's deportation. The USAF sends them to Russia to spread fraudulent intelligence, but upon his return to the air base Wayne is suspected of acting as a double agent and scheduled for brainwashing. Leigh arranges for their escape to Austria.