Vicar's daughter Izzy feels hugely guilty that she's having a very good war. Having learned to fly in a travelling circus before the war she's now joined the Air Transport Auxiliary as one of their few female pilots and is having the time of her life. The only cloud on the horizon is having to lie to her father about her exact role in the ATA. Her father is against the whole notion of women flying - he certainly wouldn't approve of her becoming a 'spitfire girl'. Izzy also feels distinctly out of place among the more upper class ladies of the ATA. She would love to be as worldly as her flighty housemate Julia or as sophisticated as society wife Clare. But when Izzy finds herself falling for the charms of a dashing American doctor it is to Julia and Clare that she turns for help...