Joan Castleman es una buena esposa, de belleza madura y natural, la mujer perfecta. Pero lo cierto es que lleva cuarenta años sacrificando sus sueños y ambiciones para mantener viva la llama de su matrimonio con su marido, Joe Castleman. Y Joan ha llegado a su límite. En vísperas de la entrega del Premio Nobel de Literatura a Joe, Joan decide desvelar su secreto mejor guardado.

Luiza is an architect who just got out of a ruinous relationship. Gabriel is a biologist and he has finished a long marriage with divorce. When they both meet, chances that they can do well together are not that big. But they will try to, even if their friends Barata (a convict bachelor totally skeptical when it comes to love) and Marta (a mathematic analyst who wishes that human relations were just as exact as numbers are) think otherwise.