September, 1986. Alice and Martin are 17 years old. They come from provinces to Montesquieu high school in the capital. Like many youngs of their age, born in the 70s and nostalgic of a too comfortable childhood, they progress carefully in life. While Alice and Martin are finding their footing, demonstrations against the Devaquet law and the tragic death of Malik Oussekine are happening.

Behind the scenes of the filming of a film on climbing a cliff by Patrick Berhault and Georges Unia on the parishes of the route "La Tête de Chien" in Monaco. Director Laurent Chevallier explains the difficulties of filming at height, the kind of shots that are suitable and the specifications of equipment suitable for filming on a cliff.