An American businessman visiting Nagoya, Japan, meets a woman in a hotel bar. Returning to her room, 3 ninjas kill her and wound him, but he sees the ninja boss' face. Now, he's the prime target of a dangerous ninja cult.

Mr. Miyagi is back and he takes a new pupil under his wing: a troubled adolescent girl.

An expert in "kenpo" karate avenges his Koreatown friend, slain by a mobster in Los Angeles.