During a commemoration for Japanese soldiers fighting in the US Army during World War II, Mr. Miyagi meets the widow of his commanding officer. He gets to know her granddaughter Julie, an angry teenager who is still feeling the pain of losing both her parents in an accident and is having problems with her grandmother and her fellow pupils. Mr. Miyagi decides to teach her karate to get her through her pain and issues and back on the right path.

A CIA operative kills a terrorist during a prison break. When a group of terrorists attempts to recover a microchip implanted in the man’s body, one of them is captured and convinced by the CIA to work for them as an informer.