When Jo Kang Ja learns that her daughter is being intimidated by some classmates, she decides to enroll in high school as an undercover student to teach the bullies a lesson.When Jo Kang Ja learns that her daughter is being intimidated by some classmates, she decides to enroll in high school as an undercover student to teach the bullies a lesson.When Jo Kang Ja learns that her daughter is being intimidated by some classmates, she decides to enroll in high school as an undercover student to teach the bullies a lesson.
