Heavyweight champion George `Iceman’ Chambers is framed while boxing in Russia and once again sent to prison. His only way out is to win illegal mixed martial arts matches against another inmate.
Yuri Boyka is a professional Russian prison fighter who appears as the main antagonist in the Undisputed II film, and later became the main protagonist of the third film to the latest Undisputed film.
Not much is known about Yuri Boyka before he went to prison. But during his life as a prisoner, he aims to become “The Most Complete Fighter In The World” boasting about winning a hundred fights before he unexpectedly loses to George Chambers.
Yuri Boyka was first seen as an arrogant sadistic person who wants to become the champion of the prison fighters boasting about being “The Most complete fighter in the world”. He is a prisoner participating in an illegal underground fighting match against Davic set by his Manager Gaga. He somehow finishes the fight quickly and quickly dispatches his opponents by throwing harder kicks than he can possibly be.
He seems to be a relentless prisoner as he doesn’t like people to stand on his way. On the other hand, Chambers isn’t fully aware of Boyka’s mischief in prison. Steven warns Chambers about standing in Boyka’s way as he refuses to listen, Chambers throws a drink at his face agitating him and hereby starting a fight.