The unknown

Behind the door you will find the portal to another realm. It is where all the unknowns go because they don't know who they are. People have been shoved into the other realm with their brains washed out. Also the realm to the nonliving who have been cursed with immortality. It has always been locked because the witches had always said the person that will open it will curse the world with demons. The witches knew it would happen sometime. A boy, seventeen years of age had opened the door on the day of all Hallows Eve.  Then everyone escaped from the prison behind the door. Every single human was gone. Ever since then the demons ruled the world.