Rodrigo Díaz de Vivar, “Mio Cid”, is in love with Jimena, but the Count of Oviedo, his father, challenges him to a duel and is killed. He before him curses Rodrigo, that if he marries Jimena, he will lose his manly faculties. And, in fact, when he gets married, Rodrigo becomes effeminate.

Rodrigo Díaz de Vivar, mio Cid, está enamorado de Jimena pero el conde de Oviedo, su padre, le reta a un duelo y es muerto. Antes maldice a Rodrigo, que si se casa con Jimena perderá sus facultades de hombre. Y, en efecto, al casarse, Rodrigo se afemina. Urraca le secuestra y seduce, con lo que Rodrigo recupera sus fuerzas y se transforma en el "Cid Cabreador".