A virtuous Spanish princess becomes Queen of Portugal, then troubled by social struggles and court intrigue. She negotiates a truce between the king's and his son's factions; and performs a miracle, by changing bread into roses, to appease the king's ire, as he had forbidden her to distribute bread to the poor peasants. After her husband's death, she enters a convent, resting her crown at the tomb of Santiago, in Compostela.