"Hell Girl" tells the story of a seemingly ordinary high school girl -You’ve summoned me. My name is Ai. "Ai gives a straw doll to the person seeking revenge" Take this. If you truly wish revenge, just untie the scarlet thread from his neck. Pulling the thread binds you into a covenant with me. I will ferry the soul of your tormentor straight into the depths of Hell... however, once vengeance is served, you will have to deliver your end of the bargain. There always has to be a price. When you die, your soul will also belong to Hell.