Sunho falls off the school building. Sunho's parents are devastated to see their boy unconscious in the hospital. Meanwhile, Sunho's friends secretly delete a video playing the "Avengers Game" on their phones before meeting with the detective on Sunho's case.

On the day of Joonsuk's departure to England, Jinpyo and Eunjoo are held back after receiving a call from detective Park. With the new evidence on his hands, detective Park interrogate all the students and parents involved in the case. Meanwhile, Eunjoo meets Inha to beg for her forgiveness.