The teenage "dramedy" follows the fast friendship of four Chicago high-school girls with varied personalities and from different backgrounds. Alecia is a transplanted Alabamian whose passion is music and who wants to sing more than anything else. Niki is from a well-to-do family and enjoys the the wealthy lifestyle--and boys--very much. Sierra is an idealist fervently committed to the causes she believes in and has a talent for organizing. Cris, usually called by her last name Castelli, is the athlete of the group and comes from an Italian-American family that runs their own restaurant.