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.

Adèle's life is changed when she meets Emma, a young woman with blue hair, who will allow her to discover desire, to assert herself as a woman and as an adult. In front of others, Adele grows, seeks herself, loses herself, finds herself.