In this chapter, we learn that the key master is a job that releases a prisoner from jail. In other words, it's a job to release a prisoner who's been in jail for a long time. The key master's job is to get the prisoner out of jail so that the prisoner can go back to his or her country of origin. The prisoners in the star country are going to try to find the moon country king's base, but they can't find it yet. They have a hunch that the wall that's in the middle of the school is actually an invisible wall, and they'll find it. They'll send people out to look for the wall, but first they have to thank the other prisoners for helping them find the school. The five elite members of the kingdom are waiting to meet the king. They tell the prisoners that they're the ones who are supposed to be in charge of running the school, and that if they want to live, they can come with them. They search the school and find the wall. They follow it, but it won't budge, so they turn around and head back. They can see the tracks of the wall on the map, but the wall doesn't move. They wonder if they can figure out where the enemy's bases are based. They ask the prisoners if they'd tell them anything, and if they would, they might tell them something. They don't have the keys to open their cell, so the prisoners have to wait until their team mates come for them.