September 1960: on a purely punitive basis, eight scouts must climb the solid mass of Brévent to 2500 meters of altitude. The so beautiful and so majestic mountain which draws up face them very quickly reveals dangerous. All the techniques of orientation learned at the scouts will do nothing there. The teenagers find themselves delivered to themselves. Lost in the abrupt throats, the eight boys are confronted cold, with the hunger and the fear. A tension starts to reign between these young people of different origins and of which concerns divergent: some worry for Algeria, for a brother left to the combat, or a family threatened of expulsion in metropolis, still the girls worry to like others. The group divides then to find an exit, but one of them disappears in water frozen from a torrent. While young people try to protect itself in a closed down refuge, the others will seek the helps...