Her name is Hitori. She is a vengeful antihero who is half human, half spirit. She kills any humans that committed sins in their lives. Sometimes, her fury is so great that she doesn't even care, and kill any living anyway. Formerly, she was a caring mother of two children. One day, an unspeakable tragedy happened to her and her children. After her death, she became a spirit, wandering around villages in the countryside where she commits horrifying slaughters.