Windyedge Airfield, Scotland. World War II. Louisa Adair, newly orphaned and shunned for her mixed-race heritage, has come here to the edge of the world to look after an old lady with a dark past. Jamie Beaufort-Stuart is a flight lieutenant whose squadron is posted to the airfield over winter. Ellen McEwan is a young woman held hostage by the German pilot who lands at Windyedge one wild stormy night carrying a terrible secret. Three young people desperate to make a difference in a war that has decimated their families, friends and country. When the means to change the course of history falls into their hands, how will they use it? And when the enemy comes looking for them, who will have the courage to strike back?