The story is about a American kid learning Kung Fu in China. A kid bullied him using his Kung Fu skills. It motivated him in school to take revenge.
ALERT!!! SPOILERS AHEAD!!! If you have not watched the film, then you don't read ahead.
There was a Kung Fu tournament. So, he began preparing for it. Finally, the tournament came. His tournament went good until the semi-finals. But in the semi-finals, the opponent had broken his leg. But he magically recovered and played the finals. He won the finals. This gives a lesson that we should not be scared of anyone. If you have not watched this film, go check it out!