I don't really think there's a great deal to say about this film in terms of plot because a large amount of the film is taken up by visual shots of people jumping from increasing heights on the Corniche Kennedy slightly to the south of central Marseille: these are essentially young males and females from the cités to the north of Marseille, no hopers, educational losers who believe that not to have a 'proper' job is far better than having a bum job. Therefore, having no chance of obtaining academic qualifications, they spend their time smoking cannabis by the Mediterranean in this relatively small area.
Suzanne (Lola Créton) is a great exception, although she manages not to be: she lives in a comfortable family in a house overlooking the area of the Corniche where the gang hangs out, and is fascinated by their activities. By mistake, the gang suspect her of stealing from them, but she is only taking photos of them diving. Challenged to dive too, she is soon in with the leader Mehdi (Alain Demaria) and his friend Marco (Kamel Kadri), much to her mother's chagrin.
Marco is a drug runner surveyed by the police, and Awa (Aïssa Maïga) and Gianni (Moussa Maaskri) in particular, and as Medhi is involved to some extent she becomes involved too. It's not exactly a Jules et Jim situation, although Suzanne is deeply attached to both men.
Visually, quite a spectacular film, although this is not Robert Quédiguian.