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.

A trapeze artist must decide between her lust for Sergio, the Happy Clown, or her affection for Javier, the Sad Clown, both of whom are deeply disturbed.