Yuhwa becomes the daughter-in-law of a powerful noble family, yet lives neglected by her husband, Gyujeong, who shows her no affection. One day, a strange, tiny companion appears before her—and in a moment of despair, she wishes it were human, wishing it were her husband instead. That impossible wish suddenly comes true. Faced with a “husband” who is both familiar and unfamiliar, human and not, Yuhwa is drawn into a mysterious, unsettling relationship that forces her to confront loneliness, desire, and the eerie truth behind the change.