In the bustling city of New York, two sisters, a wild party, and a family home that needs to be sold. When Kate, the eldest and a single mother, learns that her parents have decided to put their childhood home up for sale, the news hits her hard. To properly say goodbye to her past, she decides to throw one last party in the place where so many memories were made. Her younger sister, the responsible one and a bit "stuffy," initially opposes the idea but eventually gives in to the whims of her older sister.
Together, they embark on a journey of nostalgia and rebellion, trying to revive those moments of freedom and abandon from their youth. The party turns into absolute chaos, where old friends, unexpected acquaintances, and past grievances resurface. Amidst laughter, tears, and general disorder, both sisters discover that sometimes it is necessary to let go of what we love in order to move forward and find the true meaning of family.
As the atmosphere grows wilder and tensions between the sisters rise, secrets are revealed and fears are confronted, all within the context of a fun and emotional celebration that reminds us that, although we grow up, we will always carry a bit of our childhood with us. In the end, what seemed to be just a goodbye transforms into an opportunity for reconciliation and personal rediscovery.