Julien sets out to destroy Gossip Girl only to find herself in a surprising final showdown at the Met Gala.

Max, Audrey, and Aki navigate the growing complications of being a triad. Kate enters an uneasy alliance with a former foe. Julien weathers her quest to destroy Gossip Girl alone – until a shocking implication hits too close to home.

Max and Audrey scheme to redeem Kiki’s reputation – at the expense of Aki’s feelings. Kate receives an ultimatum about the future of Gossip Girl.

While Audrey juggles her father, his new girlfriend, and Kiki’s launch, Gossip Girl drives a wedge between her and Julien.

A familiar figure blackmails Kate into ruining an important event. Obie proposes a transactional offer that would destroy his family to Gossip Girl.

Kate, Jordan, and Wendy attempt to conceal Gossip Girl’s identity from a determined Mike. Audrey breaks down after Max and Aki go away on a trip without her.

Julien struggles to show Grace’s true colors to Obie. Audrey and Max suspect Aki is keeping a secret. Zoya learns of Nick’s betrayal.

Though finally the new queen of Constance, Monet yearns for a real rivalry with Julien. Meanwhile, Obie asks for Julien’s help managing their friends ahead of meeting Grace’s family.

Zoya spends more time with Shan's family--much to Nick's annoyance--while Max's parents host an important dinner that descends into chaos.

As the crew looks forward to a fresh start in the new year, a debutante ball threatens already fragile bonds.