Kickboxing champ Rick Quinn decides to retire from the ring, but his main adversary, Denard, wants him to fight again and murders Quinn's wife. Quinn suspects Denard, but can't do anything. Three month later, Quinn is jailed after a drunken bar brawl; a rich man named Le Braque bails him out and asks him to fight for him.

When shady businessman Ron Hall kidnaps his daughter, retired karate champion Michael Rivers is forced to enter a deadly illegal Kumite tournament in Bulgaria. Enlisting the help of seasoned trainers Master Loren and Julie Jackson, he discovers other fighters face the same desperate struggle to save their loved ones.

Brick Bardo is on a mission to find out which one of the world's greatest kickboxers killed his brother. Five years ago, one of the four champs was fixing fights and set up his brother in the fight that took his life. Now Bardo must take on the gang in the ring for an all-out kickboxing fight to the finish.

In this rousing sequel to Kickboxer, Tong Po broods about his defeat at the hands of Kurt Sloan. Po and his managers resort to drastic measures to goad Kurt's brother into the ring for a rematch.