At Whitmore College, Elena (Nina Dobrev) and Caroline (Candice Accola) decide it's time to throw a big party, but their plans are interrupted when Jesse (guest star Kendrick Sampson) suddenly needs Caroline's help. At Elena's request, Damon (Ian Somerhalder) comes up with an effective method to get Wes (guest star Rick Cosnett) to answer his questions. At the party, Elena finds that she and Aaron (guest star Sean Sipos) have a lot in common, and Caroline grows more concerned about Jesse. Meanwhile, Katherine (Nina Dobrev) does a favor for Matt (Zach Roerig) and manages to get through to Stefan (Paul Wesley), who is still struggling to overcome the events of the summer. Finally, Bonnie (Kat Graham) does her best to cope with her new reality, and Damon makes a terrifying discovery about a secret society.