"The Queen's Classroom" Ko Hyeon-jeong, Byeon Jeong-soo initiates plot

Ko Hyeon-jeong's dark past was revealed.

On the tenth episode of the MBC drama "The Queen's Classroom" on the 11th showed Nari's mother (Byeon Jeong-soo) plotting to get Ma Yeo-jin (Ko Hyeon-jeong) kicked out from the school ever since the Ko Nari (Lee Yeong-yoo) incident.

Nari's mother had a background check done on Ma Yeo-jin and learned that Ma Yeo-jin returned to school after losing her son in an accident and was involved with something bad.

Nari's mother threatened the vice-principal (Lee Ki-young) that she knew Ma Yeo-jin had been in prison.

Meanwhile, Sim Hana (Kim Hyang-ki) had a glass stuck in her leg. She was being treated in the nurse's office by Ma Yeo-jin when she saw a scar on her neck.