At Léon Blum High School in Créteil, France, a history teacher decides to have her weakest 10th grade class participate in a national history competition.
When 43-year-old hairdresser Suze Trappet finds out that she's seriously ill, she decides to go looking for a child she was forced to abandon when she was only 15. On her madcap bureaucratic quest she crosses paths with JB, a 50-year-old man in the middle of a burnout, and Mr. Blin, a blind archivist prone to overenthusiasm. The unlikely trio set off on a hilarious and poignant helterskelter journey across the city in search of Suze's long-lost child.
Tom, 16, is a sensitive teenager who is about to enter a new high school after being expelled. He intends to find his place, make friends and seduce the girl he loves. Tom needs the support of his older brother, Leo, a true mentor, who is working to make him a “cool kid”. However, Leo's fraternal benevolence hides a destructive temperament... Will Tom be able to grow up finding his own path?
