During a commemoration for japanese soldiers fighting in the US Army during World War 2 Mr. Miyagi meets the widow (Constance Towers) of his commanding officer. Her gets to know her granddaughter Julia (Hilary Swank), an angry teenager. She is full of pain about the death of her parents during an accident and has lots of problems with her grandmother and her fellow pupils. So Mr. Miyagi decides to teach her Karate to bring her back on the right way.