Lavender farmer Luc Bonet is raised by a wealthy Jewish family in the foothills of the French Alps. When the Second World War breaks out he joins the French Resistance, leaving behind his family's fortune, their home overrun by soldiers, their lavender fields in disarray.
Lisette Forestier is on a mission of her own: to work her way into the heart of a senior German officer – and to bring down the Reich in any way she can. What Luc and Lisette hadn't counted on was meeting each other.
When they come together at the height of the Paris occupation, German traitors are plotting to change the course of history. But who, if anyone, can be trusted? As Luc and Lisette's emotions threaten to betray them, their love may prove the greatest risk of all.