Don't Call His Name

Ghost or spirit is a suspect stories since long times ago. Is it exist or just contrive for scared the human?
Because mostly of the people never see it by themselves instead of heard from other and read the books, so they thought that it is not exist in this world.

For the person that used to see the spirit, it memorized them. We cannot explain why we meet it, but if you could see it, you , yourself can't deny that it was not true....