In the darkness and wide unknown path of the internet, there's a website that can only be accessed only at midnight. The website is known as the Jigoku Tsushin, rumor has it that if you post a grudge there, the Jigoku Shoujo will appear and drag whoever torments you into the inferno.
 
Very little is known about the girl - all we know for sure is that she lives with her equally enigmatic grandmother, that three magical straw dolls accompany and serve her, and that whenever a posting on the Jigoku Tsushin moves her, she becomes the Jigoku Shoujo and delivers the revenge for the recipient, however there is a cost for the revenge...
 
In the sequal of "Jigoku Shoujo", a mysterious girl with purple eyes called Kikuri appears and seems to have strange intentions towards Jigoku Tsushin's revenges.