Agnes Evantail has endured a miserable life as the daughter of a noble family fanatically obsessed with outdated traditions. Forced to wear her deceased grandmother's ill-fitting, antiquated hand-me-downs and heavy makeup that makes her the target of relentless ridicule, she is cruelly nicknamed the Potato Lady by high society. When her family's attempts to marry her off fail, her abusive father blames her and physically beats her. The situation explodes at a royal ball where the selfish crown princess, Mia, publicly denounces her fiancé, Duke Nazelbert, with false accusations and reveals she is pregnant with another man's child. To humiliate them both, Mia decrees that Nazelbert must marry Agnes as punishment. Upon hearing this, Agnes's family disowns her, punches her so hard her jaw dislocates, and throws her out into the streets. Her new husband Nazelbert, himself a victim of injustice, rescues her. The couple is immediately exiled to a dangerous, monster-filled frontier territory where all previous lords were corrupt, forcing them to start a new life with a terrible reputation they did not deserve. Despite this grim beginning, Agnes and Nazelbert begin to genuinely fall for each other as they work together to overcome the hostility of the locals and the dangers of their new home. Their peaceful life is later interrupted when they are recalled to the capital to help a prince rally against his irresponsible sister for the crown. As they return, those who once mocked Agnes are shocked to see the beautiful and confident woman she has become, while her abusive family faces long-overdue justice for their crimes, which include human trafficking. The story follows Agnes and Nazelbert as they build a life together, heal from their traumatic pasts, and ultimately find happiness, eventually having two children named Solaris and Luna.