Leopoldo Contreras, a professor emeritus of Roman law has serious economic problems. His translations of classical authors do not give enough money to live and had to sell even their floor. To remedy the situation is offered as a slave to a former student in exchange for room and board.

Fernando Fernán Gómez
Don Leopoldo Contreras de Tejada

Agustín González
Gonzalo Bárcena

Carme Elias
María

Amparo Baró
Felisa

Mercedes Lezcano
Margarita

Manuel Zarzo
Claudio

Beatriz Elorrieta

Manuel Galiana
Luis Cuartero

Manuel Torremocha
Toa Torán
Sandra Milhaud
Mirna Donald
Bárbara Escamilla
Atocha
Vanesa Escamilla
Almu

María Botto
Niña (uncredited)

Joan Potau
Jaume Velat (uncredited)