This musical comedy tells the story of two men whose friendship (whose beginning is told in "A toda máquina") is affected by assumptions love triangles and misunderstandings between the two, however, the value of that friendship overcomes all difficulties.

Pedro Infante
as Pedro Chávez Pérez

Luis Aguilar
as Luis Macías Valadez

Rosita Arenas
as Marianela

Gloria Mange
as Ruth

Emma Rodríguez
as Doña Angustias

Manuel Arvide
as Don Antonio

Ángel Infante
as Comandante

Manuel Noriega
as Señor Cura

Carmen Montejo
as Yolanda

Jorge Casanova
as Pretendiente de Marianela (uncredited)