A woman moves into an apartment house with her daughter. But her daughter begins to be haunted by a mysterious ghost on a hidden floor.

"Sunday Seoul" is a film with three nonsensical episodes: THE WEREWOLF: A high school student Do-yeon who is the victim of bullying in school, is the main character of the first episode. He is not good at studying or at fighting. One day, an unexpected change happens to his body. THE VISITOR: On a pitch-black stormy night, a woman is visited by a stranger seeking shelter. The stranger eventually, is revealed as a serial killer on the run. THE YOUNG ADVENTURER: Seeking revenge for his father, a son embarks on a journey in which he encounters a young girl by chance and starts to learn martial arts.

Eun-soo, a librarian watches for book vandalism that currently happens in the library. One day, she catches Jun-oh tearing off certain page of books. Eun-soo accuses him of vandalism but soon discovers the complex story behind his actions. Jun-oh’s girlfriend suddenly leaves him with only a mysterious note. “Look up page 198”. Jun-oh’s girlfriend was a bibliophile and she checked out books regularly at the library. Jun-oh goes to the library and tears out page 198 from every book he comes in touch. As Eun-soo has just broken up, she gives him an advice saying that he has to let her go if she really meant it. However, looking at Jun-oh torn apart by his love, Eun-soo starts to help him decipher the messages on page 198 of all the books .