Despondent over the closing of his karate school, Cobra Kai teacher John Kreese joins a ruthless businessman and martial artist to get revenge on Daniel and Mr. Miyagi.

After discovering that his father is at death's door, Mr. Miyagi sets out to Japan, to see him with Daniel. Upon arriving, Miyagi must confront an old rival. Meanwhile, Daniel encounters a new love, and some new enemies.

A fictional group of ex-United States Army Special Forces personnel work as soldiers of fortune while on the run from the Army after being branded as war criminals for a "crime they didn't commit."