Mr. Miyagi is sent a certified letter from which he learns that his father is terminally ill. Without wasting a minute, the old man decides to go to his hometown of Okinawa and visit his father. Daniel also flies with him, who manages to convince his teacher to take him with him.
When their plane finally landed at the Okinawa airport, a young man approached them and said that he had been sent to greet the guests. However, instead of taking the teacher and his student home, he takes them to some base, where Miyagi's best friend is already waiting for them, with whom he once quarreled very badly because of the girl. It turns out that Sato has not forgotten his grievances and now wants to take revenge on his former friend.
Much to the old man's surprise, his father is looked after by Yucca - a woman whom he loved very much in his youth and was even going to marry her. It is because of this woman that two of the best friends became enemies.