To avenge the execution of Siavaksh Rustem invades Turan. Victorious in the battle he causes Surkha, the son of Afrasiab, whom he captures in the battle, to be put to death in the same way as Siavaksh, pursues Afrasiab to the extreme border of his kingdom, and does not return till the whole of Turan has been laid waste: the booty is immense. Many years afterwards it was revealed in a dream to Guderz (Gotarzes), a descendant of that Kave, who had once forged for Feridun the club used against Zohak, that a son of Siavaksh survived. Gev, the son of Guderz, arose to seek in Turan the right heir to the throne of Iran. For seven years he seeks in vain. At length he discovers Kai Chosru, to whom his mother Feringis has already revealed the secret of his birth. In spite of the most severe persecution on the part of Afrasiab, Gev succeeds in carrying away mother and son to Iran; they swim through the swollen Oxus on horseback. But when Kai Kaus wishes to make the grandson so happily discovered his successor, Tur, the son of king Naudar, opposes the elevation of a king who has Turanian blood in his veins. Kai Chosru proves his higher claim by capturing a citadel of the demons, and erecting a fire-altar in its place. Then he sets himself to avenge the death of his father on Afrasiab. But the first army of the Iranians under Tur is defeated; and when Feriborz receives the command the warriors of Iran are again severely beaten in the valley of Peshen; a third army is shut up on Mount Hamaven. To liberate this Rustem sets forth, and conquers in the most terrible battle which he has ever fought. At length Afrasiab and Kai Chosru take the lead of their armies. After a bloody struggle the Turanians are compelled to retire, first beyond the Oxus, and then beyond the Jaxartes. Afrasiab flies for refuge to his fortified city Kang Bihist; the city is taken, but he escapes into a cave. Kai Kaus and Kai Chosru entreat the fire Adar guçasp, that Afrasiab may not escape them. A pious penitent, Hom, who hears the lament of Afrasiab in his cave, recognises him, overpowers and binds him, and leads him forth. Afrasiab entreats the penitent to loose his bonds, and then escapes once more, into a lake. The pious Hom obtains possession of him again, and hands him over to Kai Chosru, who has his head cut off in revenge for his father Siavaksh. Kai Kaus has now seen the fulfilment of vengeance on Afrasiab for the death of Siavaksh; his days draw to a close. For sixty years after him, Kai Chosru rules over Iran in peace, and then resolves to enter on a pilgrimage to heaven. When the angel Serosh has bidden him nominate Lohrasp as his successor, he fulfils this injunction, establishes Rustem as general-in-chief of the kingdom and successor of his father Zal in the kingdom of the South, and after long meditation, accompanied by the sons of Naudar, Tus and Gustehem, and the heroes Gev and Feriborz, he begins the pilgrimage to the East.