Rosie Hopkins is the schools invisible girl. She passes through her days at school only referred to as geek and nerd, hiding away from everyone around her but giving no reason to be hated. With only one true friend around her she just passes the day. On the other hand she is a swimmer by night. She is popular and competes regularly. Suddenly the arrival of a new pupil at school turns her world upside down and she must choose which path she wishes to take, or if both can meet half way?