Robin Wilson wants to join Pi Beta Alpha, Sweet Valley High's highly selective sorority. She may not be beautiful or popular, but she's friendly and smart. So when Elizabeth nominates her for the sorority, Jessica is less than thrilled. She is determined to find a way to keep Robin from Pi Beta.

But Elizabeth is just as determined to make Robin a sorority sister, and the twins become locked in a struggle that develops into the biggest power play at Sweet Valley High. Who will prevail? Which twin will triumph? What happens when sisters go head-to-head?