Ryu, a 17-year old martial artist living in Japan receives an invitation from his old sparring partner Ken to come and visit him for a while. Ryu leaves his uncle and cousin and travels to the United States, where Ken wows him with the opulence of his home and wide range of martial arts trophies. Ryu wonders if these awards are a sign of a great improvement in Ken's skills, but him it just means the local competition isn't up to much.
The two later head out for a night on the town, with an ulterior motive to find a fight. They antagonize some off-duty members of the air force in a bar, then thrash them when the soldiers lose their temper. However, as Ryu & Ken congratulate themselves on their easy win, the air-force sergeant Guile arrives.