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 from a competition she had prepared for a long time. Eunsu decides to write her last piece with the theme of the noise between the floors and persuades her friend to help her follow and track the secret.。奥利维亚是位专注于心理健康的精神科医生,她试图帮助负责坎蒂卡残忍杀害自己孩子和丈夫这起屠杀案的警官伦迪。经过几次治疗后,奥利维亚自己的心理状况却恶化了。一个可怕的邪灵长期附身于坎蒂卡身上,这也是她屠杀全家的原因,而现在这个邪灵让奥利维亚的过去重新浮现。。