Sam and Clementine have a wonderful, albeit, busy life: they have two little girls, Sam has just started a new dream job, and Clementine, a cellist, is busy preparing for the audition of a lifetime. If there's anything they can count on, it's each other. Clementine and Erika are each other's oldest friends. So when Erika mentions a last minute invitation to a barbecue with her neighbors, Tifany and Vid, Clementine and Sam don't hesitate. Two months later Clementine and Sam can't stop asking themselves the question: What if we hadn't gone?