Lilith's life is identical to that of a typical adolescent, with the exception of one significant difference: she is the devil's daughter and thus lives in hell with him. After becoming completely dissatisfied with her surroundings and expressing a desire to have fun and explore the world, she makes an agreement with her father: she will be permitted to visit Earth for one week, provided that she transforms a nice person into an evil one while she is there. After completing this obstacle, she will have the option of remaining on earth indefinitely; alternatively, she will be forced to work in the underworld's bookkeeping, which will be extremely tedious.