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.

This drama is about Jo Gang-ja, a mother who was known as a tough girl in high school. Her daughter Ah-ran is bullied at school and when Gang-ja finds out, she makes it her responsibility to stop her daughter's bullying. She ends up becoming a high school student again.—wendy mcknight