Three married couples gather to celebrate the eighteenth anniversary of their marriage mourning the absence of a friend who was best man at all three weddings.

Arturo de Córdova
as Gustavo Ferran

Laura Hidalgo
as Ada

Miroslava
as Leopoldina

José María Linares Rivas
as Javier

René Cardona
as Jorge

José Elías Moreno
as Máximo

Consuelo Frank
as Genoveva

Alma Delia Fuentes
as Clara

Armando Sáenz
as Luciano

Arturo Soto Rangel
as Francisco