Meeting for an autumnal swim in an idyllic pond, Caroline's friend Ruth tells her about a family secret that has recently been exposed. Caroline was looking forward to a celebration they'd been planning together with her sister-in-law, Tobi, but suddenly everything seems complicated.

Tensions that have long been buried are bubbling to the surface. These three couples, who have so much to enjoy in their lives - growing children, affectionate marriages, work they love - must confront the truths they've never shared. More than that, they will have to reconcile the lives they've built with the ones they desire: the old dreams both fulfilled and denied, and the new ones that appeared right when they thought they had all they'd ever hoped for.