Amicia de Rune a 15-year-old girl of noble descent who lives in Aquitaine, which has been invaded by the English Army during the Hundred Years' War. Her 5-year-old brother Hugo has been ill since birth; their mother, Beatrice, an alchemist, has sheltered him in their estate while trying to devise a cure. Let's go on an adventure with them and find out what happenes at the end.