(By unknown means, you are in a labyrinth of liminal spaces. They make you feel uneasy, and the hum of lights don't help. You can also hear inhuman noises, and feel the constant feeling of being watched. And now you have a proof to that feeling...)

You walked in a branch of paths and suddenly stepped on a piece of paper. You swear it wasn't there before. You picked it up and read its contents.

It says "Hello. I'm watching you. You can call me Izo.".