In the previous episode, prisoner fighter Yuri Boyka (Scott Adkins) suffered a serious knee injury and lost his fighting ability. He could only clean up in prison. The glory and fighting of the past were far away from him, and the prison rejected his request for parole. Boyka, who had never been willing to lose his freedom, placed his hopes on the international prisoner fighting competition, because the final champion of the competition would be free. After rigorous recovery training, Boyka defeated and replaced the contestant under Gaka (Mark Ivanir). The two once again cooperated and went to Gegong Prison in Georgia, where Boyka would compete with seven other prisoner fighters from all over the world to compete for the only prisoner fighting king. Among the contestants, the American Teber (Michael Shannon Jenkins) and the "killer" from Colombia each have their own strengths. Boyka must defeat them for freedom, but he soon discovered that the real enemy is not the opponent in the fighting field...