Lt. Franta Slama is actually just a top pilot at the Czech Air Force who's delegated to teach some promising young flier, Karel Vojtisek, and so they become friends. After Nazi Germany invades Czechoslovakia in 1939 , where they join additional Czech exiles from the RAF they reject the power of their new leaders and retreat to England. While flying a mission within England, lands crash and happens up on the farmhouse of Susan. Karel falls head over heels Susan but, while they like a brief fling, at time Susan decides she prefers the company of the worldly Franta. As Franta and Karel fight to maintain their friendship.