The year is 1440; nine years have passed since the execution of Jeanne d'Arc in Rouen, and the Hundred Years' War has reached its final stages. Fueled by greed, the nobility of France revolts against King Charles VII, aiming to restore feudal power and thwart his centralizing reforms. Though once united in their battles against the English, the nobles have turned against the crown, threatening to plunge France back into the throes of a war it had finally begun to escape.

Emily du May, the bastard daughter of a French duke, is adopted by Robert de Baudricourt and raised as "Emil"—stylizing her as a man like he had done for the late Jeanne. When Robert is summoned by Constable Richemont to fight against the rebels, Emil confronts her foster father and demands that she accompany the French loyalists.

Having visions of Jeanne, Emil is steadfast in seeing through her predecessor's mission to its end. As she attempts to stop the rebel forces led by Dauphin Louis, the power-hungry son of Charles VII, Emil will find herself face-to-face with the agents of rebellion and venture across the nation Jeanne sought to unite.

[Written by MAL Rewrite]