In Armenia, Khosrow finally meets Shirin and is welcomed by her. Shirin, however, does not agree to marry Khosrow; unless Khosrow first claims his country back from Bahram Chobin. Thus, Khosrow leaves Shirin in Armenia and goes to Constantinople. The Caesar agrees to assist him against Bahram Chobin on condition that he marry his daughter Mariam. Khosrow is also forced to promise not to marry any one else long as Mariam is alive. Khosrow succeeds in defeating his enemy and reclaims his throne. Mariam, out of jealousy, keeps Khosrow away from Shirin.