An inspector from the Educational Rights Protection Bureau (ERPB) who is authorized by the government to use physical intervention and unconventional methods to discipline delinquent students and reform the educational system.

Kye-na, an average woman in her late twenties, holds a steady job and a committed boyfriend, Ji-myoung. Yet instead of feeling content, she constantly faces uncertainty, confusion and anxiety. While struggling with personal relationships and life's woes, Kye-na finally embarks for New Zealand despite everyone’s dissuasion on leaving her home behind.

Juhee, a professor of theater, is diagnosed with a possible malignant tumor at the hospital. She goes back to school and tries to settle her affairs but many people come to her lab out of the blue.