In the early 15th century, amidst the turmoil of the Hundred Years' War, a young French peasant girl, Joan, experiences visions that she interprets as divine messages instructing her to drive the English out of France and to install Charles VII as the rightful king. These powerful convictions and her unwavering faith lead her to seek an audience with Charles, the Dauphin of France. Despite skepticism from the royal court and the daunting presence of the English occupiers, Joan's profound belief in her mission and her passionate pleas convince Charles to give her a chance. As a result, she is appointed to lead a French army.

Donning armor and taking up the banner of France, Joan galvanizes her troops with fervent speeches and a seemingly unshakeable confidence, born from her visions. Her initial successes on the battlefield bring her fame, respect, and the adulation of the French people, who see her as a beacon of hope and a divinely chosen savior. These victories, however, also attract envy and suspicion from certain French nobles and churchmen, laying the foundation for internal strife. As she pushes forward with her campaign, Joan faces not only the formidable English forces but also the challenges of navigating the treacherous political waters at home, all while trying to remain true to her convictions and the divine guidance she believes she has been given.