Having won a karate championship in Southern California, teenager Macchio and mentor Morita find new adventures on Morita's home island of Okinawa. Because his father is dying on Okinawa, Morita is about to return after a self-imposed 40-year exile, and Macchio decides to go with his
teacher. It seems that Morita's childhood sweetheart, (McCarthy) was pledged to marry his old pal, (Kamekona), although she loved Morita. Rather than fight for McCarthy, Morita left the field to Kamekona, assuming that the two married. McCarthy is still single and still beautiful, and Kamekona is
still angry. Now Kamekona wants to have that fight with Morita, while Macchio runs afoul o...