Tormented by her high school classmates and with nowhere to turn for help, Moon Dong-eun sinks into despair before deciding on a new mission in life.

Do-yeong meets with Choi Hye-jeong to find out more about his wife — and her past. Yeon-jin digs into Dong-eun’s private life.

Yeon-jin threatens Hyeon-nam after discovering her involvement with Dong-eun. Yeo-jeong devises a way to get the truth out of Yeon-jin.

Hye-jeong finds an incriminating recording on Myeong-o's tablet, and Hyeon-nam receives an unwelcome visitor as she prepares to send her daughter abroad.

Dong-eun's end game comes into focus as she sends Jae-jun a troubling package and orchestrates a plan to take down Yeon-jin and Lee Sa-ra.

As Sa-ra and Yeon-jin deal with the aftermath of their crumbling reputations, Dong-eun learns the details behind Yeo-jeong's private struggles.

Yeon-jin and Shin Yeong-jun panic over Myeong-o. Dong-eun takes care of a lingering problem. Yeon-jin’s mother schemes to remove a threat.