Federico is having an affair with Fernanda, which he believes widow, when in fact she is married. When the trick is discovered, a doctor appears very opportunely saying that infidelity is a disease caused by bacteria and has no cure. In his private clinic he applies a treatment that consists of locking up every adulterer with his mistress.
Carmen Sevilla
as Fernanda
Manolo Gómez Bur
as Melecio
Fernando Fernán Gómez
as Doctor Leopoldo Cumberri
Jaime de Mora y Aragón
as Eduardo Bernal
Andrés Pajares
as Federico Latorre
José Orjas
as Eladio
Guadalupe Muñoz Sampedro
as Baruti
Matilde Muñoz Sampedro
as Magdalena
Mary Begoña
as Emiliana Regueiro
Venancio Muro
as Raigoso
María Isbert
as Antonia
Julio Riscal
as Paco
