Fabian and Casimiro are two respectable married men, who have their little adventures every now and then, like any good husband. The problem begins to Fabian when his wife Adela, accompanied by her friend Martirio, discover him with another woman. After this, and as revenge Adela decides to return the ball to Fabian, with his best friend. Aware of the plan, Fabian looks for someone to solve thesituation and finds Casimiro, which is suitable, precisely because he lacks "it".

Fabián y Casimiro son dos hombres casados y respetables, que tienen sus aventurillas de vez en cuando, como todo buen marido. El problema empieza para Fabián cuando su mujer, Adela, acompañada de su amiga Martirio, le descubren con las manos en la masa. Tras esto, y como venganza, Adela, incitada por Martirio, decide devolverle la pelota a Fabián, con su mejor amigo. Conocedor del plan, Fabián busca a alguien para solucionar la papeleta y encuentra a Casimiro, que le viene al pelo, porque carece precisamente de "eso".