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.

The plot follows the misadventures of two young friends who are forced into street hustling and ever-expanding life of crime when one impregnates the sister of the other and they need to get the money to pay for her to have an abortion.

The film is an image of the Spanish society in form of various anecdotes which happen to the inhabitants and their neighbours of a finca in Madrid.

Eduardo, a wealthy banker who has a pastime for hiring young street hustlers to keep his bed warm, spots Miguel, an extremely handsome teen who has a penchant for women and motorcycles.

The war in Europe is ending, but the American troops have to find a scientist on the run who is also chased by some surviving SS forces.