In our world, the balance between light and darkness is always maintained by the world itself.

However, in recent years, there have been some things that have broken the balance and caused a sudden change in the environment.

For example, there are monsters that can pass through the walls and enter our rooms.

The game begins with our character, Elsa, waking up in the middle of the night. She looks around the room and sees a strange light coming from under the floor. She gets up and goes to investigate, and in the meantime, other things happen that make Elsa think there is something strange going on.