Milwoldo Ganeun Gil plot
Dong-Jo has written a book about the island of Milwol, where people inexplicably disappear. This book won him an important literary prize. To celebrate, he goes out with some friends. The next morning, he wakes up on the subway to find that his bag is missing. He goes to the lost and found section and there he finds his red bag that he lost in high school. Then his past flashes through his mind, and one by one he finds his old friends again. There is an old friend, Ki-Jung, who has told Dong-Jo about a mysterious world that formed the basis for his book. Dong-Jo wants to meet him again.