Friends and former college bandmates Elizabeth, Andrew and Zoe have watched each other marry and start families, all while trying to hold on to the identities of their youth. Now nearing 50, they all live within shouting distance deep in gentrified Brooklyn. But the summer that their teenage children start sleeping together the fabric of adult lives suddenly begins to unravel, and secrets and revelations that finally let loose ... About what it means to finally grow up well after adulthood has set in.