Although Dirk Longstreet (Olivier Gruner) lives a quiet existence as a college professor, he used to be the champion of an underground fighting club in Los Angeles known as the Circuit. Men battle to the death as money passes from one unscrupulous gambler to another -- this was the world Dirk hoped to escape forever. But when he hears that his brother, Jeremy (Ilya Morelle), has entered the Circuit to fight for money, Dirk decides he must return to the arena to protect his brother.