Patrick is a tenacious lawyer specializing in environmental law. France is a schoolteacher who becomes an activist after her husband develops cancer from exposure to a pesticide. Mathias is an ambitious lobbyist working for an international chemical corporation. The paths of these characters collide as the lives of thousands are affected by a tragic act that sparks a powerful movement while the corporation fights to prevent the truth from being revealed.

Olivier, the nine-year-old son of Elisabeth and Serge, a country veterinarian, vanishes one afternoon on the way to his grandmother's house. The emotional aftermath of his disappearance sends his father packing and nearly destroys his mother.

Salomé Lerner just finished writing an autobiography. She goes to a TV show called "Apostrophes", hosted by French TV showman Bernard Pivot. Pivot then imagines a film that could be created from her gripping story. A film entirely made of music because after seeing the young pianist Erik Berchot, Salomé believes seeing her long lost brother, who was a musician as well. A brother she had lost along with her parents in 1943. However, the Lerners did in fact escape the gestapo and might have based themselves in Paris...