The story deals basically with class differences among people. Jane, as has been established, comes from a rather rich family. Her home time holds a Barrett's Day party and keeps talking about it. Andy and Toby are invited, of course, but they have major questions about their reception among the rich.
The B-story is about a new woman that takes Allison's place. The woman is named Pembroke and she runs Canby Hall like a prison, handing out demerits as fast as she can to as many students as she can.
The three girls go to the party and, as expected, Andy and Toby have major problems from the word go. Yet there still seems a chance for them to bridge the gap and get a dead party moving.
Pembroke has her own back story and it's interesting. There might be a chance there for some form of compromise.