Kahpe Bizans tells us the story of Yetis Bey (Cem Davran) and his struggle with Byzantian Emperor (Illetyus) in a humorous way.

Murat, who lost his father a few years ago, is deep in debt, while Metin is about to marry the girl he loves. While the two young men are trying to save money, Murat has lost everything he has to the casino owner Organik Rıfat. Murat, who unexpectedly meets his grandfather he never knew existed, is drawn to Bergama with the dream of becoming rich, but he is still unaware that his life is about to change completely.