13-year-old Soo Ah lives with her widowed mother. Her mother runs a diner to support them, but Soo Ah thinks she's always too busy to spend time with her. Meanwhile, Soo Ah believes her real mother lives in Seoul and is a popular singer. She loves to daydream about her real mom. One day, Soo Ah decides to leave her home and go to Seoul to see her real mom's concert. She gets on a train and meets a friend. The two of them find their way to concert hall, but they don't have money to buy concert tickets. They wait by the back door.