Su-na, once a bright and adorable girl, locks herself alone in her room after her best friend's suicide. She starts to talk and behave as if someone else exists in her room, but never opens the door to anyone.
The nine-tailed fox is a mythical shape-shifting creature which can become a human being in its 1000th year if it eats the liver of a human being. A family of such foxes open up a circus and transform themselves in the hope of capturing human beings.
When The Quiet Family was put on screen amid high expectations of a box-office hit, cinema magazines did special features on spooky films of korea. However, this film is far different from the horror movies of the 1960s and 1970s that usually dealt with a pre-modern ghost with a sharp shrill.