Living out a real-life fairytale in Paris for the summer, bad girl Blair is pursued by a handsome young man, named Louis, who she suspects is a member of Monaco's royal family. A very concerned Lily asks Serena to help her find Chuck, who hasn't been heard from or seen in months. Meanwhile, a newly single Serena is enjoying a Parisian summer of love with boys, and hanging out with Blair and Balenciaga as she tries to avoid the inevitable decision about which of her two long-time beaus, Dan or Nate, she should return to. Back in New York on the Upper East Side, Nate meets an intriguing girl, named Juliet, who helps him realize that his summer of sexual conquests with the help of Chuck’s little black book was his way of avoiding his unresolved feelings for Serena. Meanwhile, Dan’s baby mama drama continues with the very pregnant Georgina. Finally, the van der Woodsen apartment is buzzing with activity as the “Fashion’s Night Out” event is planned.