In her homeland, Philia was both celebrated and reviled—the greatest saint of all time, but looked down upon as an insufferable woman. After her fiance sold her off to the neighboring realm of Parnacorta, she didn't expect a warm welcome. And yet she's quickly come to accept that her new life here might be happier than the one she left behind. With things looking up, it becomes all the more worrisome when she senses the demonic world drawing near after hundreds of years of silence. As monsters grow in number, Philia resolves to pursue a difficult and ancient magic to protect the people of her new home.