Since her mother's death, Sarah, the daughter of an earl, has been bullied by her family as the daughter of his ex-wife. One day, due to the whims of her sister-in-law, Irene, who married into the royal family, Sarah ends up switching places with him and playing the role of the prince's wife. She had heard that the 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!