From the mysterious murder of Colonel Duplan, the story of Guy Rossi, who served under Duplan’s command during Algeria’s war of independence in 1956. From Rossi’s diary, which was anonymously delivered to the French Minister of Defence, there starts an investigation on the young man, who was officially declared "missing in action" at the time. This subsequently brings to light crimes and atrocities committed in Algeria during those years, which were marked by the torture of Arab prisoners and terrorist attacks against the French. Based on the homonymous novel by Francis Zamponi/