Pedro, a shepherd, is sleeping in his Pyrenean mountain hut when his herd is attacked by a lone wolf. He awakens to defend his sheep, and strangles the wolf. In the Catalan lowlands, the construction of a canal is completed and diverts water from the farms and fields of the peasants to support the prized bulls of the landowner, Don Sebastian, marquis of Roccabruno. The request of the peasants for water is arrogantly rejected. He has, however, significant debts and needs money. The rich Amelia plans to marry him, but he offends her. Martha, a “beggar dancer”, has come to the village, and entertains the people. Sebastian sees her and takes her to his castle, enchanted by her beauty and grace. He keeps her as his mistress in a "golden cage"...