It is May 1940 and Hornet Squadron are billetted with their Spitfires in France, near the German Border. The 'phoney war' is over with a vengeance and France is being attacked by the Luftwaffe. The two young brides of Hornet Squadron members are leving for England, but there is now a danger at every crossroads and the RAF are being pushed back at every encounter. With the death of Squadron Leader Rex there is an urgent need for new tactics, new aircraft and a new fighting spirit if the young pilots of Hornet Squadron are to survive. 'Fanny' Barton, the quiet Australian, takes over...