Kenji, an avid motorcyclist, loves nothing more than cruising on his bike. One day he invites his friend Tomomi to a scenic tour of Hakone, during which they meet a mysterious car driver known as “Wednesday’s Cinderella.” She drives a Porsche that is rumored to be haunted by a devil, and every week, motorcyclists gather to challenge her, yet none ever succeed. Seeing this as a personal test, Kenji asks a local bike shop owner to tune his motorcycle for the competition. The owner initially refuses, his past trauma triggered by the sight of his own bike, and the trauma linked to the Cinderella driver, preventing him from helping. Eventually, however, he agrees, hoping that Kenji’s effort will help cure the troubles of the enigmatic driver.