Since her mother's death and her father's remarriage, Sarah, the daughter of an earl, has been bullied by her stepmother and stepsister. One day, due to the whims of her stepsister, who married into the royal family, Sarah ends up switching places with her and playing the role of the prince's wife. She had heard that prince Sirius was cruel and didn't even look at her... This is a marriage love story that begins with a body swap and ends if it is discovered!