Duelo final (1980)

Description

Legendary martial arts star Chuck Norris takes on a deadly terrorist training camp known only as The Octagon in this deadly tale of revenge! Plagued by painful memories as a fighter, Scott (Norris) has stayed away from the dark side of battle. But when wealthy heiress seeking revenge hires him to infiltrate an international terrorist operation run by his adopted brother, Scott has no idea what he is coming up against. Drawn closer and closer to The Octagon, Scott realizes his brother is using his skill in the deadliest manner, training men in the ninja style of killing. Now it's up to Scott to battle his brother in the ultimate showdown of good vs. evil.