After the death of General Franco, the Leguineche family leaves their estate of Los Tejadillos, where they have remained for decades in voluntary exile, with the purpose of returning to Madrid to actively participate in the social events of the aristocracy and to get closer to the closest circle of the Spanish monarch. The obsession of the old marquis is centered on getting in touch with the most illustrious surnames, to ascend socially and to resume the pomp and courtly life that his family lost a long time ago. To this end, he decides to move into an old palace he owns, located in the center of the capital, but not before overcoming the difficulties posed by his wife, who deeply hates both her husband and her son. To regain control of the palace, the Marquis of Leguineche tries to handicap his wife, arguing an incurable mental illness, and then undertake a reform of the place in order to adapt it to aristocratic life.

La Monarquía ha vuelto. Los Leguineche, también. En la segunda entrega de la saga de los Leguineche –precedida por "La Escopeta Nacional" y completada con "Nacional III"-, al terminar el régimen franquista, el marqués de Leguineche regresa a su palacio de Madrid. Tras treinta años de exilio voluntario en su finca Los Tejadillos, tiene el propósito de acercarse al Rey y poder reanudar el boato y la vida cortesana de antaño. Pero los intentos por llegar hasta la Casa Real no serán tan fáciles, creando disparatadas situaciones entre los curiosos personajes que componen la familia del viejo marqués.