The tale of the series unfolds in 15th-century France, amid the Hundred Years' War waged against England. Montmorency, hailing from a noble family, delves deep into the study of magic and alchemy while attending a school for knights. However, as France suffers a crushing loss at Agincourt, the institution shuts down and Montmorency must flee for his life. Along the way, he fortuitously encounters a remarkable peasant girl named Jeanne.