Sent to an enemy nation as a substitute bride for a defeated princess, she lives in constant terror of her new husband, a king rumored to be a bloodthirsty murderer. However, she soon discovers that her natural scent is the only cure for his mysterious, tormenting illness. As he draws her closer, desperate for relief, she experiences a warmth and affection she has never known before. Even if she is merely being used as a remedy, she resolves to heal him, hoping that the man feared as a monster will eventually open his heart to her.