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.

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.