Abandoned by his father, Lorenzo has always lived with his mother and stepfather Marc, whom he adores. But when Lorenzo's mother separates from Marc, he no longer has any rights over the child. A new partner, Sébastien, moves in with them, and from now on, Lorenzo is no longer even allowed to meet Marc to play soccer. Lorenzo rebels at being tossed around at the whims of adults.

Twelve-year-old Noah has only reached the fifth grade after repeating a year and can barely read or write. The undisputed leader of the playground, Noah is hiding a big secret: at his age, Noah still wets the bed every night. In his evening remedial class, Audrey becomes attached to the boy and tries to pull him out of the abyss he's sinking deeper into every day.

Alice seems disturbed, and has even gone so far as to steal cakes from the local grocery. Her grandfather, who is raising her, remains unreachable and invisible.

Autistic Nino's arrival at Lumière doesn't go unnoticed. He's seen as weird by the children, except for one, Djibril, a clever little Arab boy who chooses to befriend him. Nino lives with his father but dreams of finding his mother, who abandoned him when he was little. Djibril decides to help his friend in this endeavor.

Violeta, a little Gypsy girl that Lucille manages to enroll at Lumière, is becoming increasingly integrated. A strong friendship has developed between Lucille and Violeta. However, during a police raid on the Gypsy camp, the little girl's uncle and mother are arrested for trafficking in false papers, a tragedy that has shattered the fragile balance Lucille had built.