¿Por qué pecamos a los cuarenta?

Alejandro Quesada (Fernando Fernan Gomez), an eminent doctor successful with women, drives his old friends Federico (Juanjo Menéndez) and Enrique (José Luis López Vázquez) to change their attitude towards life. The death of a common friend, Luis (Jesus Puente), reaffirmed in the attempt to enjoy their existence and seek the association of younger women than their wives.