Mr. Miyagi is once again teaching martial arts to a teenager. This time, his student is a girl. She is the granddaughter of an American soldier who saved Miyagi from certain death during the war. She’s having trouble at school and at home, and her boyfriend has gotten into a conflict with a school gang led by the football team’s brutal coach. However, thanks to Mr. Miyagi’s lessons, the main character eventually manages to stand up not only to her peers but also to the adult villain.