Tell me if this is a good idea for a story...?

..teenage girl, roxanne (or something) goiing thru changes in her high school career. has really wealthy friends, one of them THERESA is a pretty bad egg. in 8th grade theresa was sent to a rehab facility centered on helping eating disorders and treating them. roxannes parents are pretty wealthy and well known and her mom wants her to go to the annual summer camp that roxanne always goes to and is a counselour at.. her mom tells her to invite theresa and her other friend mary kate. mary kate and theresa have other plans, however... sign up for camp, make parents pay all the money and instead go on a road trip for the time (month and a half). roxanne falls for it and ditches camp. theresa invites roxies b/f, and his two friends. ends up that theresa screws everyoneup and just wanted to meet up with her druggie anorexic hippie friends, and roxies b/f is a loser who screws with mary kate, etc.. its all like everyone has secrets and finding your true friends and religion in situations ...