Dr. Horatio Kane has been kidnapped, and is being forced to create an army of martial artists who will help take over the world. His daughter, Kandy Kane, enlists the help of Steve Chase (and a few of his friends) to rescue her father before it's too late.

Two former ranking figures of the Axis powers (the evil General Von Rudloff and Japanese master Miyagi) schedule a deadly martial arts tournament in Von Rudloff's desert castle. They race to assemble the top competitors from around the world, with the rebellious Steve Hunt being the most sought after.