Sophia is identical to her twin sister Isabella in almost every way—the same heart-shaped face, the same deep emerald green eyes that seem to hold secrets, and the same cascade of chestnut brown hair that falls past her shoulders. But where Isabella's smile was warm and open, Sophia's is guarded. There's a sharpness to her cheekbones, a tension in her jaw that her sister never carried. She dresses in elegant, understated clothing—tailored black dresses, pearl earrings, and cashmere sweaters—always prepared to disappear into a crowd. But when she's alone, she wears the simple silver locket that holds the only picture she has of her sister.