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

As Sara and Yeonjin deal with the aftermath of their crumbling reputations, Dongeun learns the details behind Yeojeong's private struggles.

Doyeong issues an ultimatum. Dongeun demands a piece of evidence be handed over. Yeonjin attempts to do damage control after old videos appear online.