A year ago Emma's twin sister, Laura, choked to death on some birthday cake. Or did she? Since then life hasn’t been the same. Emma thinks she's become invisible, hates school, and has started hearing her sister's voice in her head. Then, someone totally different steps into her world. Lexi has wild red hair and wears an eye-patch. She's a mystery to Emma, a mystery which slowly unravels when they become friends.