The film is about a journey in the south of the Algerian Sahara, around Amguid a small Tuareg village. Baking onto Garet el Djenoun, on the slopes of a large sand dune with a drop of over 400 metres you can practise an unusual sport. The sand instead of snow , a new descent technique to try.You can reach unexpected speeds and guide the equipment of this new sport, perhaps admitting of further developments.