Boris “Kos” Kosinski, portrayed by Eryk Lubos, is a leading figure in the world of MMA. During a crucial match against his formidable opponent, Denim Takaev, played by Mamed Khalidov, Boris makes a critical error that shatters his career. This setback costs him dearly, leading to a tumultuous journey filled with highs and lows. However, it also motivates him to embark on a monumental quest to reclaim his dignity and the affection of those he holds dear.