After being charged with first degree murder, Russian fighter Yuri Boyka is sent to maximum security prison. However due to the corrupt jail fights that go on, he is practically treated like royalty for being unbeatable within the ring. When American boxing champion Ice Chambers enters this cruel world, Boyka fights to maintain his dominance as there is now one that can threaten his undisputed title. Within the next two Undisputed films Boyka takes over the role of protagonist.