The Mongol Commander Ulugan arrives at the Kayı Tribe to challenge Osman Bey, intending to destroy his reputation and life. Osman Bey must decide how to respond to Ulugan's threat and plan. Meanwhile, the Mongols capture and brutally torture Prince Orhan in Karacahisar. Osman Bey faces the challenge of rescuing his son amidst this brutality.

A poison spreads through the tribe, endangering lives, including Poena's. Alaeddin Bey searches for an antidote, while Bala Hatun fears losing Poena, not knowing she is her daughter Halime.

Osman Bey increases precautions against the Mongols, and Ilbay plans to counter these measures, aiming to thwart Osman Bey's defenses. The tribe faces multiple threats, testing their resilience and leadership.