Three best friends, all with the same birthday, are about to turn forty. They plan to share this momentous occasion together at a summerhouse in Maine, talking up a storm and taking stock of their lives and loves, their wishes and choices. But none of them expect the gift that awaits them at the summerhouse: the chance for each of them to turn their "what-might-have-beens" into reality... for now, as Leslie, Madison, and Ellie reunite at the summerhouse, each finds a puzzling card from a "Madame Zoya," offering them the chance of a lifetime: to relive any three months from the past. Will the road not taken prove a better path? Each woman will have to decide for herself as she follows the dream that got away.