Baptiste is a solitary type. A teacher in southern France, he never stays more than three weeks in the same job. One Friday, he finds himself in charge of Mathias, one of his pupils, who hasn t been picked up after school. Mathias takes the boy to his mother, Sandra. She s a beautiful woman who has led a bit of a wild life and who now works on a beach near Montpellier. Within a day, the trio have formed a bond, like the beginnings of a family for these three people who don t have one. But the magic doesn t last. Sandra owes money and if she doesn t pay up something dire could happen. She must hit the road, flee once again. To help Sandra, Baptiste must take a look back at the origins of his own life, at the most painful and secret parts of himself.