There is a girl who was called Jigoku Shoujo. She would deliver vengeance for those who wish for someone to disappear. But by doing that, they will go to hell themselves and suffer for eternity after death. And she is now revived.

When you thirst for revenge, there's a surefire way to get it: Simply go to the strange website that appears only at midnight, and enter the name of your enemy. The Hell Girl will appear to drag your tormentor to eternal damnation. But you will have to pay a price… your soul!