Teenage Carter Stevens is confident, pretty and popular, traits that are usually handy in navigating high-school life. But nothing prepares her for the punch-to-the-gut news that comes out of an investigation into a party: Carter was abducted when she was 3, and the teen must return to her biological family, who thought she was gone forever. As Carter tries to forge a new life with her real mom and dad, a twin sister and a younger brother -- and adjust to a new school and town -- she vows to protect the single mother who raised her and is now sought by police.