1947. On a beach, Madeleine, a waitress in a hotel restaurant, mother of a little boy, meets François, a rich and cultivated student. The force of attraction that pushes them towards each other is commensurate with the secrecy that each carries. If we know what Madeleine wants to leave behind by following this young man, we discover over time, what François is desperately trying to flee by mixing Madeleine's fate with his.

1956. Algeria is a French colony. Fernand and Helene are madly in love. Fernand is an activist, fighting for independence alongside the Algerians. Helene is fighting for Fernand’s life. History will irrevocably change the course of their destiny.

Blonde admired Brune's intransigence, who loved Blonde's spontaneity. Blonde had known how to say "yes" and enjoy the secondary benefits of her moral weakness (having a husband, children, in short, something like life)... Brunette had known how to say "no" and patiently suffer the inconveniences of her greatness. But now, after ten years of separation, Blonde arrives at her friend's house and the opportunity arises for both of them to try on each other's lives like trying on a dress.