As the Germans blitz Poland in 1939, a young fighter pilot finds his way to France and ultimately England where he distinguishes himself in the Battle of Britain. He meets a woman and falls in love and so does she over time. He crashes in the English Channel and ultimately is captured. 

After escaping he seeks to return to his love and tries to cross the Pyrenees but is captured again where he is imprisoned until the end of the war nears. He then learns his love was a spy working for her father and had given the Germans secrets that caused the death of his best friend. The same secrets he had inadvertently told her. When they finally meet, they still love each other but he feels he could never trust her again but he then learns he is the father of her young daughter.