There's something inside this woman.
 She can be heard every night!

 Unemployed Do-hwan (Park Won-bin) who lives off stock investments is suffering from a riddling noise ever since In-kyeong (Yuri Seo) moved in upstairs. He can't work or sleep and gets misunderstood by In-kyeong as a perverted psycho but he falls for her more and more. Hwa-jin, who has a crush on Do-hwan, finds out that In-kyeong is a medium and spreads the word. Do-hwan decides to help In-kyeong who is about to get kicked out. The two of them are drawn to each other and start an investment guide towards the apartment residents. However, when In-kyeong fails to make anymore predictions they are once again faced with a wall...