When her home is destroyed in a bombing raid over London, Miranda Beddoes is forced to take refuge with her grandparents in Dorset. With both her parents doing their duty for king and country, she joins the WAAF. Despite her dedication to work, Miranda falls for a charismatic fighter pilot. As the battle rages in the skies above them and she learns that his plane has been hit, it is only the friendship of her fellow girls in blue that keeps her going as she waits for news.