Serena, Blair, Nate, Chuck and the rest of their friends 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 keep silent, but this creates major problems between Serena and Dan, because Dan is not ready to take the fall for someone else and risk his future. While working on a documentary project about private schools, Vanessa accidentally captures Blair and Chuck discussing their affair. Meanwhile, Lily tries to tell Rufus how she really feels about him.
Serena, Blair, Nate, Chuck and the rest of their friends 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 keep silent, but this creates major problems between Serena and Dan, because Dan is not ready to take the fall for someone else and risk his future. While working on a documentary project about private schools, Vanessa accidentally captures Blair and Chuck discussing their affair. Meanwhile, Lily tries to tell Rufus how she really feels about him.