The next morning, Mr. Shim is scheduled to leave, and Mr. Gunchan wonders if they should extend his stay. He asks if Mr. Minhoon has planned to kill him, and the latter replies that he has not. He says that he is building a "sand castle" and that he will kill anyone who tries to enter it. He wants to hear what he has experienced, what he feels from his own mouth, and that is why he wants to speak to Minhoon. He is afraid that if he does not kill Minhoon, he will not be able to stop the flow of human beings entering the castle.