The story takes place in France in 1961 or 1962, at the end of the independence war in Algeria. Thomas (Alain Delon) is a former legionnaire who has chosen to join covert action against pro-FLN militants. Thomas is not a really politically-motivated activist, he has just followed his platoon commander. His group has abducted a female left-wing attorney (Lea Massari). In charge of guarding her in an empty flat, he kills another member of the group. Wounded, wanted by both his right-wing organisation and the police, he tries to escape with the girl. From the same movie-maker, and about a close topic, also see "Le Combat dans l'île".