A fictional film based on a true story. Set in the 1980s, it tells the story of Joon-kyeong (played by Park Jung Min), a math genius high school student who lives with his sister Bo-kyeong in the countryside of Gyeongsangbuk-do, where even the road is hard to find. Joon-kyeong worked hard to build a simple train station with his sister and the people in the village with the help of his girlfriend Ra-hee (played by Im YoonA). Lee Sung Min also plays the role of Joon-kyeong's father....