When the Caesar of Rum approached Goshtasp, he inquired why the prince had concealed his radiant lineage for so long. Goshtasp answered that he had once held high standing at the court of the Shah of Iran, where all the warriors knew his prowess. He proposed to ride to the Iranian host himself, receive their submission, fulfill Caesar's desires, and make Caesar's renown shine across the world. Pleased by these confident words, Caesar granted him leave.
Goshtasp mounted his swift warhorse and rode straight to the camp of his noble brother Zarir. As the Iranian troops recognized the heroic son of Lohrasp, they rushed forward on foot with tears of joy, bowing to the ground in gratitude that their long suffering had ended. Prince Zarir, weary of battle, dismounted immediately, folded his brother in a tight embrace, and warmly inquired after his well-being. The grandees and champions of Iran then assembled upon seats of honor.
Zarir delivered the royal message from King Lohrasp: 'Our father has grown old and turned his heart entirely to the worship of the pure Creator. He has dispatched the imperial crown and treasures to you, declaring that the realm of Iran and the supreme throne belong to you alone, while a quiet corner of the realm suffices for the rest of us.' Zarir then presented the glorious crown, golden armlets, torque, and the solid ivory throne. Overjoyed, Goshtasp mounted his father's throne and placed the crown upon his head. The royal kin of Kay Kavus and the valiant champions of the house of Goudarz—including Bahram, Saveh, and Rivniz—hailed him as the true Sovereign of the Earth.
Goshtasp then sent a messenger to Caesar, inviting him to the plain where the Iranian army stood ready to seal an alliance. When Caesar arrived and beheld Goshtasp reigning atop the ivory throne adorned with a turquoise crown, he embraced him, finally recognizing that this bold knight was the true heir of Lohrasp. Deeply apologetic for his past ignorance and harsh treatment, Caesar begged for forgiveness. Goshtasp graciously pardoned him and requested that Katayun, who had stood by him in adversity, be escorted to his court.
Caesar returned to his camp in awe and repentance, bestowing an imperial dowry upon Katayun: vast stores of treasure, five emerald crowns, red rubies, a thousand Roman attendants, five camel-loads of gold dinars, a royal philosopher to manage the treasury, alongside fine weapons, war-horses, armored bards, and rich silks of China for the Iranian army. Katayun arrived at the royal pavilion amidst the thundering of war-drums.
After escorting Caesar back to his borders with honor, Goshtasp led the host toward Iran. King Lohrasp himself rode out with all the realm's magnates to greet his son. Tears of emotion flowed as the aged monarch embraced Goshtasp, stepped down from the throne, placed the imperial crown upon his son's head, and formally abdicated—surrendering the destiny of Iran into Goshtasp's capable hands.