Due to her wicked younger sister who has a habit of calling things "unfair," an older sister who has been continuously robbed of her precious possessions is labeled a villainous lady through her sister's schemes, has her engagement broken, and is banished. In her place of exile, she is doted upon by a margrave, and together they take revenge on her younger sister.

Cyris, the eldest daughter, was always called cunning and selfish. She had her precious things stolen by her younger sister, refused to lend anything to her younger sister out of spite, and was oppressed by her family—her father sided with her sister, and her mother died early. She managed everything in the household. Described as a cold-hearted realist without feelings, she was originally a kind young lady who cherished her family. However, when she was chosen as the Crown Prince's fiancée, she was framed by her younger sister's schemes and called cunning. Her engagement was broken off, and she was exiled to the frontier. What method of revenge did Cyris employ?