Erina's life takes a bleak turn after being taken in by Marquess Sinor due to her magical skills. The Marquess subjects her to years of maltreatment and anguish, dragging her to the brink of collapse. However, when Erina decides to end it all, she encounters her previous self, Marystella, the former dominator of the land. Marystella implores Erina to help unravel the enigma of her demise. As compensation, she vows to transform Erina into the most exceptional magician of all time. With this newly acquired potency, Erina can finally escape her torment and agony, and live the life she always desired.
