The Messenger portrays the story of St. Joan of Arc, the famous French war heroine of the 15th century and religious martyr, played by Ukrainian-born Milla Jovovich. The story begins with young Joan witnessing the atrocities of the English against her family, following her through her visions, to her leadership in battle, through doubt (with Dustin Hoffman playing a character who we are never sure is God, Satan or Joan's own conscience and who is visible to only Joan), and finally to her trial and execution.