Heinrich and Conrad were the sons of Kurt, a brave knight who had retired from the wars, and now dwelt in his ancestral castle Liebenstein. The brothers were alike in all matters pertaining to arms and chivalry. But otherwise they differed, for Heinrich, the elder, was quiet and more given to the arts of peace; whereas Conrad was gay, and inclined to like fighting for fighting's sake. Brought up along with them was Hildegarde, a relative and an orphan, whom the brothers believed to be their sister. On reaching manhood, however, their father told them the truth concerning her, expressing the wish that one of them should marry the maiden. Nothing loath, both brothers wooed Hildegarde, but Conrad's ardent, impulsive nature triumphed over Heinrich's reserved and more steadfast affection. In due course preparations were made for the marriage festival, and a new castle, Sterrenberg, was raised for the young couple adjacent to Liebenstein. Heinrich found it hard to be a constant witness of his brother's happiness, so he set out for the Holy Land. Soon after his departure the old knight became ill, and died on the day that the new castle was completed. This delayed the marriage for a year, and as the months passed Conrad became associated with loose companions, and his love for Hildegarde weakened. Meantime news came that Heinrich had performed marvellous deeds in the Holy Land, and the tidings inflamed Conrad's zeal. He, too, determined to join the Crusades, and was soon on the way to Palestine. However, he did not, like his brother, gain renown--for he had not the same incentive to reckless bravery--and he soon returned. He was again to prove himself more successful in love than in war, for at Constantinople, having fallen passionately in love with a beautiful Greek lady, he married her. One day Hildegarde was sitting sorrowful in her chamber, when she beheld travellers with baggage moving into the empty Sterrenberg. Greatly astonished, she sent her waiting-maid to make inquiries, and learned to her sorrow that it was the returning Conrad, who came bringing with him a Greek wife. Conrad avoided Liebenstein, and Sterrenberg became gay with feasting and music. Late one evening a knight demanded lodging at Liebenstein and was admitted. The stranger was Heinrich, who, hearing about his brother's shameful marriage, had returned to the grief-stricken Hildegarde. After he had rested Heinrich sent a message to his brother reproaching him with unknightly behaviour, and challenging him to mortal combat. The challenge was accepted and the combatants met on the passage separating the two castles. But as they faced each other, sword in hand, a veiled female figure stepped between them and bade them desist.