1961 : The Algerian War has been raging for seven years. Marc Dallers, a future lawyer, arrives in Algeria for the last ten months of his militariy service. he is a sergent in charge of a patrol. Lagrange is a young, mentally retarded country-boy, mistakenly placed in the same patrol but who should have been sent home some time before. But Lieutenant Morin, an unscrupulous career officer, has had a wooden gun made for him so that he can fight alongside the others without harming them. Dallers gradually becomes friend with Lagrange...