Serena, Blair, Nate, Chuck and their class break into the school swimming pool for a night of fun, but when someone nearly dies, the school threatens to expel the person responsible for the break-in. Everyone agrees to not say anything, but this creates major problems between Serena and Dan. Vanessa, while working on a documentary project about private schools, accidentally captures Blair and Chuck discussing their affair. Lily tries to tell Rufus how she really feels about him.

Previously on Gossip Girl, Rufus (Matthew Settle) and Alison broke up for good. Rufus wants to get back together with Lily (Kelly Rutherford), but Bart Bass proposed to her before Rufus could do anything about it. Blair (Leighton Meester) warned Vanessa (Jessica Szor) not to interfere with Serena (Blake Lively) and Dan‘s (Penn Badgley) relationship. Blair had sex with Chuck (Ed Westwick) and doesn‘t want anyone to know about it.The CW‘s promo guy has been promising us for weeks that tonight‘s
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