Being the new girl is tough- just ask 16 year-old Rio Jones. A New York transplant, Rio has no clue how she's going to fit in at her fancy new private school in Southern California. Plus, being late, overdressed, and named after a Duran Duran song doesn't make the first day any easier.
Then, Rio meets Kristi. Beautiful, rich, and a cheerleader, Kristi is the queen bee of Newport Beach, and she isn't friends with just anyone. So Rio is thrilled when she's invited to be part of the most exclusive, popular clique. Of course, like any club, Kristi and her friends have rules- always smile (even if you don't mean it), always dress cute (and never repeat oufits more than twice a month), and always flirt (but only with jocks, preps, and rich college guys).
Kristi and her friends introduce Rio to a world of underage drinking, drug dabbling, and hooking-up. At first, Rio is having a great time. But, as she becomes more immersed in this jet set crowd, Rio discovers there is one last unspoken rule that her new friends forgot to mention: don't cross Kristi.