During a summer spent with her cousins, whose freedom and incessant flirting at first surprised her, young Isabelle met a charming playmate whom her mother and aunt, worried about this tender friendship, forbade her to see again. This doesn't stop Isabelle from meeting Yves and learning that friendship and love are not the same thing: the sweet little friend is left alone with his dreams and the memory of a too-pretty girlfriend.

Philippe Marcillac grew up in Sète, where he specialized in pranks of dubious taste. One day, as a teenager, he organizes a party in an abandoned villa. Philipe finds himself alone with Marie-Titite, who advises him to restart his life on a more serious footing.

Judge Julien Lamy regularly deals with the welfare of children, namely down on their luck delinquents. When an orphan named Alain Robert burns down a barn belonging to his abusive foster family, Judge Lamy has no choice but to send him to a juvenile jail. There he meets an older boy named Francis Lanoux, who is desperate to escape and be reunited with his girlfriend Sylvette. The boys eventually flee the institution, as Francis goes in search of his lost love and Alain continues looking for his parents. Unfortunately, the little rebels run into some big problems once on the outside.

A new teenage student arrives at a prestige boarding school in Bavaria, having not only the ability to play the guitar and sing, but also to charm animals and detect ghosts. Quickly becoming part of a secretive club of five other students, he is inadvertently stranded by them at an abandoned chateau on an island in the middle of a large lake, where he encounters an enchanting young woman who wants to escape... Also filmed in a separate German-language version with largely different cast, MARIANNE MEINE JUGENDLIEBE, q.v.