After all those stories in the past, the Plastics break up and chose to go on their own ways. They all move to their senior year and they are assigned to share dorms with someone. As in... sharing dorms with another person. How crazy was that?

Cady Heron was on her way to her dorm and she knocks on the door, someone opens it.. it's.. Regina George?

Regina: "...Cady..?"

Regina looked at Cady and it seems like she's happy to see her again