Sarcelles. The TGV, broken down, takes a break at the city's RER station. A young passenger, music manager, has never set foot in the suburbs. This is an opportunity for him to go and study urban music.

It is the end of the school year for the children of a dormitory town. Most of them leave the place for a vacation with their parents but not Lucien and Adama whose parents can't afford the expense. While the big brothers of the housing estate are busy breaking the law Lulu and Adama manage to sneak into their neighbors' trailer. The two stowaways are elated until they reach their destination: a nudist camp...!