A noise is coming from the floor upstairs. Eunsu, hears this for over a month which causes uncontrollable anger to rise up. She gets eliminated again fr@我色我爱@om a competition she had prepared for a long time. Eunsu decides to write her last piece with the theme of the n@美女大战精子无敌版@oise between the floors and persuades her friend to help her follow and track the secret.