The voice next door tells the story of a man who is starving to death. The man is a member of a marketing team at a company called Eunjin. He has been working at the company for days and has been unable to go out because he has been stuck at the office for so long. He is worried that he will not be able to make it to the theater for the opening night of the movie. He tells the man that he was busy just a few days ago and that many more events need to be planned. He says that if the man does not attend the movie opening night, then he will have to kill himself. He asks the man if he is going to go to the bathroom and the man tells him that he is. He then tells his friend that he has received a message from Park and that the man is texting him because he is not going to have sex with Eunseok.