Frank Dux has entered the "kumite", an illegal underground martial-arts competition where serious injury and even death are not unknown. Chong Li, a particularly ruthless and vicious fighter is the favorite, but then again Dux has not fought him yet.
"Bloodsport" follows Frank Dux, an American martial artist serving in the military, who decides to leave the army to compete in a martial arts tournament in Hong Kong where fights to the death can occur.