Delphine is the author of an autobiographical novel that has become a bestseller. Exhausted by the promotional tour, just when she feels out of place, paralyzed by the idea of having to start writing again, she meets Elle, a young, attractive, intelligent, intuitive woman who seems to understand her better than anyone.

In May 1940, soldiers and civilians struggle by land, sea and air to evacuate the British army and their allies, Europe's last hope, from Dunkirk.