Yuri Boyka is a Russian champion of underground ultimate fighting, gradually recovering from the injury he got in the last match. He decides to return to the ring. Defeating the current champion of prison "Black Hills" in the battle, his boss - Gaga - decides to send him to international prison championship. Injured knee is felt in every battle and Boyka is worried, but he is willing to go to the end to fight the Colombian fighter and prove that it is undisputed.