Frank Dux—an American martial artist trained in secret by a reclusive ninjutsu master—defies military orders and travels to the neon-lit underworld of Hong Kong to compete in the legendary Kumite: an illegal, no-holds-barred fighting tournament. As he battles world-class fighters from across the globe, Dux must honor his fallen mentor, survive the brutal gauntlet, and face off against a sadistic champion with a deadly grudge.
