Existem duas situações marcantes na vida de um casal: O dia do casamento e o divórcio. Bill e Catherine vão experimentar as dores, felicidades e angústias desses dois momentos distintos, separados por dez anos de diferença.

The musical follows the relationships of what at first seems like two different couples separated by a span of time; one couple is getting married and the other is getting divorced. It turns out they are actually the same couple at two points in their relationship—a decade apart.