Years ago, Mona was desperate to be in Alison's group of friends, but to them she was just a dork to be avoided at all costs. Times have changed since Alison's been gone. Big time. Now Mona is one of the popular kids at school and her BFF is none other than Hanna Marin. But can a person change that much? And when Hanna begins to reconnect with her old friends, what does that mean for Mona and her new-found social status?