Osman Bey besieges Akhisar Castle, battling both the Mongols, who destroy Turkish tribes, and Sofia, who plots revenge. The Mongol envoy demands taxes from Osman Bey, which he refuses, angering the ambassador and leading to massacres. Osman Bey, undeterred, targets Akhisar, facing the Mongol threat and Sofia’s new traps. Lucas and Sofia plot to stop him, while Poena provides Sofia with camp information. Key challenges include Bala Hatun’s response to the Mongol envoy, Osman Bey’s strategy for Akhisar, preventing massacres, and handling Sofia’s schemes. The outcome hinges on Osman Bey’s leadership and tactical decisions.