The narrative unfolds through a series of races on imaginative tracks, tailored to her running style. It increasingly focuses on the true identity of the Emperor, who is revealed to hold numerous mini-titles that are compared against the Emperor of Yonkuro. The epilogue to the epic challenge of the Rally of Hell features this race, where a group of thugs is challenged; they seek to exploit the best Mini 4WD racers to recover a hidden treasure. The story centers on a brother and sister, Tatsuya and Kiyoko, who are the children of a scientist at the Twin X facility. This story utilizes the very popular main character, Yonkuro Hinomaru.