After completing his military training, young Léo, a taciturn soldier with family problems and secret addictions, is assigned to one of the units that patrol the streets of Paris in search of possible terrorist threats as part of Operation Sentinelle.

Local boy, Peter, is trying to find the source of the metallic sound that haunts the village. When he shares his footage with an old woman it sparks memories of a bear that roamed the hills during her childhood.