In 1988, 17-year-old math genius Joon-Kyung lives in a small village. The village has a railroad that passes through it, but it doesn't have a train station. Joon-Kyung's lifelong dream is to have a way station for his sister and the villagers. He tries different ways to get a station built, including writing dozens of letters to the president with Ra-hee, the popular girl who has a crush on him.