Yoon Ah-yi is an impoverished high-schooler who has stopped believing in magic and wishes only to grow up quickly and escape her hardships. She meets Ri Eul, a mysterious magician who lives in an abandoned amusement park and refuses to grow up, and who asks her a single question: do you believe in magic? As Ah-yi keeps returning to the park, her cold, well-off classmate Na Il-deung begins watching her lessons, and the three are drawn together around the magician's strange world.