Audrey Hepburn portrays a nun whose life journey takes her from the staff of a mental asylum to a surgical nurse in the Belgian Congo. She returns to Belgium as WWII breaks out and is torn between the needs of the Resistance and the church's neutrality.
Screen chronicle based on actual 1917 events outside Fatima, Portugal, where three shepherd children report visions of the Virgin Mary and confront anticlerical government oppression in the process.