Based on the novel “Seonamyeogo Tamjungdan: Banggwa Hooui Miseuteori“ by Park Ha Ik which was published on 2013-Jan-25 by “Golden Bough Publisers”. Five students are members of a private investigator club at Seonam Girls High School. They try to solve the problems of private education, abortion, bullying, suicide and other problems in the Korean education system.