The students wake up and realize that they are trapped inside the armory. They are given their last exam, which is to escape the room. After making it out alive, they learn a valuable lesson about working together. Soon Duk and Si Woo grow closer through this experience and share a special moment. Meanwhile, Chae Yoon meets with Chairman Wang Hao and asks about his past.
Shi-Woo et Sun-Ah doivent surmonter leur traumatisme commun alors qu'ils ont été piégés avec leurs camarades dans une pièce sur le point de prendre feu. Jung refuse d'aider le reste du groupe.
