Queen's Classroom

From lecturing, meetings with students' parents, self-defense to first-aid treatment, Ma Yeo Jin masters everything and strives for perfection in every aspect. She joins Sandeul Elementary School as a homeroom teacher of Class 6-3 after her two-year hiatus. With a poker face, Yeo Jin teaches her rebellious students using an unorthodox and unique method, and she tells them the inconvenient truth. Besides, what had happened to Yeo Jin during the two-year hiatus?