During the Middle Ages, a humble shepherd named Sancho lives in love with Elvira, a beautiful girl from the same social class as him. Both wish to marry, but first they must ask the consent of the Count of whom they are servants. The nobleman does not hesitate to grant it, but when he discovers how beautiful the girl is, he will feel a burning passion for Elvira, so he will exercise his power to keep her in his castle and thus prevent the wedding. Sancho, desperate, will ask King Alfonso himself for justice.