Once upon a time, there was a beautiful young woman who died. She went on a murderous rampage and she forever haunts the place of Yotsuya. The end.
In many cultures, ghosts are put in different categories. Such is the case with Onryō (怨霊 onryō,) It basically means “vengeful spirit” or “wrathful spirit” in Japanese and is a mythological spirit of vengeance from Japanese folklore. They also have ghosts, called yurei, but these differ in the will of the ghost. As opposed to the yurei, these ghosts doesn’t just get over their revenge thoughts.