Massie Block, with her glossy chestnut hair, laser-whitened smile and ah-mazing wardrobe, rules the social scene of exclusive Octavian Country Day, a private girls' school in the wealthy suburbs of Westchester County, New York. Massie's clique, aka The Pretty Committee, includes expert shopper and logo-laden Alicia Rivera, diet fad-obsessed redhead beauty Dylan Marvil and super-smart star athlete Kristen Gregory. As their undisputed alpha, Massie is set on keeping her spot at the top. Enter Clarie Lyons, the new girl from Florida, in a fashion don't outfit and two year old sneakers - clearly not Pretty Committee material. Unfortunately for her, Claire's family is staying at the guest house on Massie's huge family estate. With no way to avoid The Clique and eager to fit in, Claire's future looks worse than a Prada knockoff. But with a little confidence and a lot of scheming, Claire just might stand a chance.