Friends and former college bandmates Elizabeth and Andrew and Zoe have watched one another marry, buy real estate, and start businesses and families, all while trying to hold on to the identities of their youth. But nothing ages them like having to suddenly pass the torch (of sexuality, independence, and the ineffable alchemy of cool) to their own offspring. Back in the band's heyday, Elizabeth put on a snarl over her Midwestern smile, Andrew let his unwashed hair grow past his chin, and Zoe was the lesbian all the straight women wanted to sleep with. Now nearing fifty, they all live within shouting distance in the same neighborhood deep in gentrified Brooklyn, and the trappings of the adult world seem to have arrived with ease. But the summer that their children reach maturity (and start sleeping together), the fabric of the adult lives suddenly begins to unravel.