The 16th Pyramid Game begins, and Ha Rin suggests picking a classmate who will permanently stay in Grade F. Just before a vote takes place, Soo Ji tells the whole class that Ye Lim was attacked and hospitalized. The class decides to vote whether to stay in the game or not, and the whole process is livestreamed, bringing chaos to the whole school. Meanwhile, Ja Eun tells Soo Ji what she did to Ha Rin when they were young.
Le grand jour est arrivé. Des tensions naissent entre Su-ji et ses amies. Ha-rin est dans les cordes. Le reste du monde découvre l'existence du jeu de la Pyramide. Ha-rin contacte Ja-eun.
Der große Tag ist gekommen: Ha-rin wird in die Enge getrieben und die Öffentlichkeit erfährt vom Pyramid Game. Ha-rin sucht Ja-eun auf.
