Yuri is a schoolgirl who recently transeferred to an ordinary all girls high school in Seoul called Jeon-Yong High. Life for Yuri is difficult, as she has an illness, which may kill her if she doesn't take illegal drugs supplied to her by a gangster group. She does not have money so she can't go to a hospital for it. The gangsters demand for her in return to do their dirty work. She follows them because they are the people who has brought her in. She tries to cope in this high school while dealing with her condition...