The story follows Güven, who works as a manager at an accounting firm in Kavşak. Güven, who has a happy marriage, sees his routine life begin to unravel when the new department manager, Arzu, moves into his office. Meanwhile, the landlord's son is trying to reach an agreement with a contractor to demolish the house they are living in, and accounting clerk Haydar is embezzling company funds. A small slip-up in Güven's life, combined with Arzu's uncontrollable curiosity, causes events to unfold like a snowball effect, leaving Güven cornered.

Polat Alemdar Erhan and Cahit are yet again on the front lines only to discover a military coup attempt in Turkey.

In the middle of the 13th century, following the death of "The Iron Sultan, Alaeddin Keykubat," Mongols attack Anatolian Seljuks to destroy the last power against "The Great Khan". Allegiance or independence turns into an issue of debate among the Seljuk statesmen. A secret resistance is possible. A new and stronger state is not a dream. Emir Celaleddin Karatay, Vizier of Seljuks is to sparkle a nationwide resistance. His way is not predictable.