Some years after fighting Monroe "Undisputed" Hutchen in prison, former boxing champion George "Iceman" Chambers visits the Russian Federation for a series of boxing matches and commercial airings, where he is subsequently framed for possession of cocaine and once again sent to prison. There, he witnessed the harsh environment of a Russian prison and discovers a series of illegal mixed martial arts matches dominated by inmate Yuri Boyka. The prison officials arrange these fights and place large side-bets to make a personal profit, often at the expense of the fighters. Chambers shares a cell with Stevie Parker, a British junkie.