"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.

A lonely woman runs a coffee shop to support her in-laws while waiting for her husband to complete his jail sentence. She begins fantasizing about a particular college student who visits her shop daily

Hyeong-Do and Chang-Min went to same school. Chang-Do is a young man who keeps his hometown while Hyeong-Min leads a twisted life in Seoul with ambitious dream. Using fund of Madam Min, a bigwig, and her friends, Hyeong-Do buys home land a lot to take the margin. As his father dies during this turbulence, Chang-Min determines to take revenge and goes upto Seoul. While he wanders about downtown in Seoul, Chang-Min happened to meet Madam Min's friends and chases them one by one to take revenge on Madam Min.

After her husband abandons her, Madam Min enter into real estate in the hopes of getting rich quickly. She buys out many farms and re-sells them to businesses seeking to build factories and warehouses. Chang-min, in an effort to save his ancestral land from being developed, goes to Seoul to plead with Min not to destroy the land.

Living in poverty at home with her mother, Young-ah dreams of becoming a famous fashion model. She 's loses her virginity, seduced by a drug dealer, and is forced to work for Doo-shik's gang. Kang Baek-chon lost his brother to drugs, and is out to destroy the operation. He meets Young-ah while investigating a friends car accident, who has now been corrupted by the life she's leading. The organizations Boss orders added security by sending his head man Cobra to protect the profits. Young-ah only values money now and has moved up in the organization. Will Baek-chon destroy the gang and get Young-ah out in time?