A travelling group of young people running a pirate radio station from a small truck encounter an eccentric elderly couple who are on the run from the law.

Isamu, a star athlete in high school, becomes a race cyclist. He wins his debut races, but soon his opponents see through his lack of strategy and beat him easily. Isamu's maths teacher, a race cycling freak, says he knows the solution to Isamu's problem. But will Isamu listen to him?