Jang-il, the smartest of the school, and Seon-wu, the strongest kid in Yeosu, are best friends. Influenced by Jang-il, Seon-wu starts studying and working hard towards his dream. However, all of a sudden, Seon-wu’s guardian, Kyung-pil, dies a mysterious death and Seon-wu becomes blind while investigating on the case. Su-mi witnesses the scene that Jang-il attacks Seon-wu but remains silent on it and waits for the right moment. Ji-won, who is a volunteer reader for visually impaired people, meets Seon-wu by chance and they fall in love. Despite his strong feelings for Ji-won, however, Seon-wu breaks up with Ji-won so she can have a better life. 13 years have passed. Jang-il becomes a special prosecutor. Seon-wu becomes a young CEO of Royal Tree, an investment trust company. Ji-won works as a VIP party planner at a five-star hotel. And Sumi becomes a hyperrealism painter. They all have gone their separate ways. However, the fate draws them back together…

The story of domestic help who work for rich households. No Soon Geum is one of these housekeepers; despite the master-maid heirarchy, she's bold, fearless, and unafraid of doing hard work in order to support herself. As a child, Soon Geum had dreamt of living a grand life in a Cinderella story, complete with her own white knight, but that dream had faded as reality took over. However, she reaches a turning point in her life when she is hired as a maid for the rich and handsome Kang Gun Woo.

Based on the popular Internet novel, "Multi-Cell Girl", the film takes place in "No-Use High School", a school renowned for its sexual aberrations. The student body is comprised of sexually ambiguous teenagers, and the student president and vice-present flaunt their taste for S&M. Independent study and supplementary classes are done on homosexuality and transgenderism, and teachers and students alike leave school early because of sexually-transmitted diseases. But amidst this environment, there are some that just can't adapt. Among them: "Poor Girl", a student who earns money for her family by sleeping with older men; "Anthony", a luxurious pretty-boy from Switzerland; and "One-Eye", the school's sole virgin. Poor Girl falls in love with Anthony at first sight. Meanwhile, Anthony is struck by One-Eye's brother "Two Eyes" and feels confused about his sexuality.

This drama is about the takeover of the Korean government in 1979 by Chun Doo-Hwan .