Since the occupation of the free zone and the dissolution of the armistice army in 1942, the plateau, a veritable natural fortress at an altitude of 1000 meters in the Dauphiné Alps, has become a refuge for young French people who are resistant to compulsory work service. Trained and trained, these shadow soldiers must serve a plan that has been in development since March 1941: the mountain plan. The immense Vercors plateau, 150 km long and 50 km wide, is to serve as a drop zone for Allied paratroopers. Serge Tignères sets off to discover this little-known battle, a symbol of the resistance
