The narrative unfolds through a series of races on imaginative tracks, tailored to her running style. It increasingly focuses on uncovering 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 this epic challenge, the Rally of Hell, involves a race where the protagonists confront a group of thugs attempting to exploit the best Mini 4WD racers to recover a hidden treasure. The story centers on a brother and sister, Tatsuya and Kiyoko, children of a scientist at the Twin X facility. This narrative features the very popular main character, Yonkuro Hinomaru.