American pilot Tom Martin (Ray Milland) is a soldier of fortune who went to Spain to fight in the Spanish Civil War. During the summer of 1939, he is languishing in a prison cell while awaiting execution. Unexpectedly granted a pardon on the morning that he is to face a firing squad, Tom's release has been managed by reporter Augusta "Gusto" Nash (Claudette Colbert), who posed as his wife. When the prison governor learns of the deception, the pair has to run for their lives.