Ania Kowalski has a large scar on her skull and lives under constant medical control. If her apartment is comfortable, her actions, gestures and moods are recorded and analyzed by several hidden cameras. Ania will told her terrible story to Bruno Manali, a young reporter who stays with her and night and day.

West Africa, early 1960s. A French officer is assigned to find a missing missionary. His investigation, amid mistrust, silence and prejudice, takes him far away from the glittering shoreline, where day and night become one.