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.

Eunjoo breaks down after learning the truth about the accident and is horrified by her cold-hearted husband who insists on burying the the truth for her son's future. Inha finds out that Eunjoo was at school or the day of the accident and reports to the police. Meanwhile, Joonha and Jinwoo meets Dahee's parents to find out what happened between Dahee and Sunho.