A girl discovers she has a half brother Charlotte Flannigan (Tottie, for short) leads a conventional life in a conventional family. Her father is a well-respected pediatrician, her mother a popular newspaper columnist, and her younger brother a talkative but otherwise okay kid. But on an ordinary Saturday afternoon, Tottie's comfortable life is threatened when the doorbell rings. She answers it to find a teenage boy, who looks eerily like her father,...