Iris Sabrina sets out from home to the capital to fulfill her dream of becoming a knight. However, her journey takes an unexpected turn when she’s mistaken for her twin sister—whom she never knew existed—Arke Bright, a notorious villainess who’s been missing for months. As Iris struggles to navigate life in the capital and prove she’s not her sister, she meets a family she never knew she had and a handsome prince who helps her unravel the truth behind her sister’s dark past.