Six years after the first anonymous blog post rocked New York society - and viewers at home - 'Gossip Girl' returns for an unforgettable final season. It begins with the Upper East Siders working together to find Serena, who's gone off the grid. Blair and Chuck reunite with a bang, but can her love help him win back his empire? Lonely Boy Dan writes a new tell-all book that's even more revealing than the first, Nate plans to put The Spectator on the map by exposing Gossip Girl's identity, and Rufus' surprising new ally threatens Lily and her family. This would be too much drama to handle anywhere else, but on the Upper East Side, it's a fight to the spectacular series finale! So who comes out on top? And who am I? That's one secret I may just tell...XOXO, Gossip Girl!