The Undisputed franchise consists of American martial arts sports-drama movies,[6][7][8] based on an original concept by David Giler and Walter Hill.

[13] George "Ice Man" Chambers, the reigning heavyweight boxing champion, has his world turned upside down when he is accused of rape and sent to prison.

Upon commencement of his sentence, Chambers finds himself at odds with the local prison boxing champion of the last decade named Monroe "Undisputed" Hutchins.

[14][15][16] After being released from Sweetwater Prison, George "Iceman" Chambers had returned to his boxing career and reattained his title as Heavyweight Champion of the World.

[17][18][19] Following the knee injury he received during his match with George "Ice Man" Chambers, Russian inmate Yuri Boyka has been removed from the underground fighting organization and reduced to custodial work within the prison.

Discovering that his widowed-wife named Alma is forced against her will in a life of servitude to a crime syndicate, Yuri finds a purpose in freeing her from her captors by once again entering a series of underground fights.