Un officier anglais, (Hobart Bosworth) pendant la première guerre mondiale rêve de la vie de Jeanne d’Arc (Geraldine Farrar). L’officier trouve dans la paroi de la tranchée qu’il occupe une vieille épée qui appartenait à Jeanne d’Arc. En la saisissant, il fait apparaître le fantôme de Jeanne d’Arc, qui lui conte son histoire.
In the village of Domrémy, the young Joan is visited by Saint Michael, Saint Catherine, and Saint Margaret, who exhort her to fight for her country. Her father Jacques d'Arc, mother Isabelle Romée, and uncle beg her to stay at home, but she leaves them and travels to Vaucouleurs, where she meets with the governor, Captain Robert de Baudricourt. The dissipated Baudricourt initially scorns Joan's ideals, but her zeal eventually wins him over, and he gives her authority to lead French soldiers. Joan and her army lead a triumphal procession into Orléans, followed by a large crowd. Then, in Reims Cathedral, Charles VII is crowned King of France.