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.

Moojin and Inha are left in shock after hearing about Sunhoo from Donghee. To find out the truth, Inha heads over to Eunjoo's house to meet Joonsuk. Meanwhile, Sooho and Donghee decides to work together to find the culprit and meets reporter Choi to get his help. Will they be able to prove that Joonsuk was behind the school violence?