International spy Jason Starr disappears following an altercation while on a mission. His boss seeks out Jason's twin brother, veterinarian Warren Starbinder, and asks him to pose as Jason in order to complete his mission.

In the future, large corporations earn millions of dollars by staging gladiatorial fights to the death that are shown on worldwide television. One day, however, a fighter who is scheduled to hunt and kill an opponent in the Arizona desert decides he's had enough, and makes a run for it. His opponent is instructed to track him down and kill him.