''Have you ever wanted to rewrite your past?''

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 expects the gift that awaits them at the summerhouse: the chance for each of them to turn their ''what-might-have-beens'' into reality.

Leslie, Madison and Ellie met nineteen years ago, in the most unlikely of places: stuck in line at the New York City Department of Motor Vehicles. From that memorable day, the day they each turned twenty-one, they quickly grew into an intimate trio of friends. Now, as they reunite on their fortieth birthdays, they each find a puzzling card from a ''Madame Zoya'' offering them the chance of a lifetime: to relive any three months from the past...