Jigoku Shojo (Hell Girl) has a cool concept, it centers on Hell’s Correspondence which is a web site that can only be accessed at midnight by those with a deep grudge, you submit the name of the one whom you wish to punish and the Jigoku Shojo (Hell Girl) will appear before you. The Jigoku Shoujo, Enma Ai, offers to immediately send that person to hell for you…however after you die you will have to pay a price by going to hell for all eternity as well. She then hands you a straw doll with a red string around its neck, if you wish to make the contract with her you simply must pull the string.
Each episode focuses on those who access Hell’s Correspondence and the events that push them to the point of damning themselves to hell for a bit of revenge. Eventually a detective and his daughter show up in each episode and act as a link and a developing plot between all the episodes as they attempt to stop Enma Ai and those she makes contracts with.