At thirteen-years-old, with an unusually high IQ and a knack for observing things about other people, Lou Bertignac is not only the youngest in her class at school; she is also the most unusual. Painfully shy, she has few friends, save for Lucas, whose company helps her get through each day. At home, Lou's life is also difficult: Her mother hasn't left the house in years and her father spends his days crying in the bathroom. Lou's world is dark and sad... That is, until she meets No.