After the death of Sulayman, his sons Kılıç Arslan and Daud are imprisoned in Esfahan by Melik Shah.  In their absence, the Sultanate of Rum is ruled under a quasi-regency by the man Sulayman left in charge of İznik - Ebu'l Kasım.   Ebu'l Kasım fights and negotiates with the Roman Emperor and the Great Seljuk Sultan, maintaining the independence of the Sultanate - until Kılıç Arslan and Daud manage to return as Al-Dawla Al-Nizamiyya comes crashing down.