Prince Arslan from the Kingdom of Pars finds himself into a predicament when a young prisoner from the nation of Lusitania holds him hostage in an attempt to escape.

Arslan and Daryun seek the help of the retired tactician Narsus, but convincing him to join their cause will not be an easy task.

Kharlan continues his pursuit of Arslan, unaware that he fell for Narsus' scheme and his forces are ambushed in an unfavourable terrain, where Arslan's party meets Gieve and Farangis, who join their cause as well. Meanwhile at the capital, Silvermask confronts the captive King Andragoras, revealing his identity and motives.

Arslan and his subjects seek refuge in the Kashan Fortress, governed by Lord Hodir, but it does not take long for the party to realize Hodir's true intentions for sheltering them.

With no time to absorb Bahman's shocking revelation, Arslan must decide how to deal with the invading army led by Rajendra, Second Prince of the Kingdom of Sindhura.

With the fall of the Fortress of Gujarat, Gadevi sets out to meet Arslan and Rajendra on the battlefield. Vastly outnumbered and facing war elephants, Arslan and company must find a way to win.

Arslan returns to Peshawar. In the meantime, Hermes must walk the fine line between remaining useful to Lusitania and furthering his own interests.