Yoko lives an ordinary but happy married life with her husband, whom she met at her previous workplace. - Although the two were modest, they were eager to set up a new home and live in a new world. - The two go to greet the residents upstairs. - When the door opens and a strange smell appears, the person who peeks out is ``Kamata,'' a widower whose wife ran away from him. - The happy daily life of a married couple is turned into a nightmare by the hands of a lonely, powerful demon...