Jenny Humphrey has left her Manhattan school to attend elite Waverly Academy in New York horse country where glamorous rich kids don't let the rules get in the way of an excellent time. She will do anything to become The It Girl, and rooming with the two most popular girls in school, Callie Vernon and Brett Messerschmidt, it finally seems to be happening. But when notorious Tinsley Carmichael returns to find Jenny with her old friends and in her old bed, she's determined not to let Jenny get all the attention...

Is Waverly big enough for Jenny, Callie, Brett and Tinsley? They're all beautiful, captivating, and a little bit crazy... but there can be only one It Girl.