The man is sleeping and hears a tapping on his chamber door.
The knocking grew louder, so the man opened the door and nothing but darkness was there.
The tapping grew louder than before so the man opened the door again and seen a raven. The raven flew inside and laid above the man's door.
And the Raven, never flitting, still is sitting, still is sitting On the pallid bust of Pallas just above my chamber door; And his eyes have all the seeming of a demon’s that is dreaming, And the lamp-light o’er him streaming throws his shadow on the floor; And my soul from out that shadow that lies floating on the floor Shall be lifted—nevermore!
The man thought that there was an unseen presence haunting him