The train station is one of the busiest places in the city. People with different walks in life come together at the train station so that they could reach their destination in the fastest way they can. But despite the goal of all of the people riding in the train, they see people who might change their lives forever.

He wants to take a break from his hectic schedule so he decided to ride the train as a form of relaxation so that he could unwind and see beautiful places. In a few months, he thought to himself, it will be difficult for him to ride the train because he will no longer be Cho Kyuhyun the genius Math Olympiad. He will be the 13th member of the populay boyband Super Junior.

She plans to explore Seoul all by herself. She is a brave girl, that's what her grandfather would always tell her, so it will be easy for her because she has a map and she has the skills that would knock any man who will try to go easy on her. Riding the trains will make her explore and enjoy the beauty of Seoul.

They have no idea that riding the train will make them see not just beautiful places but unforgettable faces who will alter their fate.