Sakamichi doesn't just want to win this race, he's running it to prove he belongs with the fastest cyclists in Japan, and every kilometer is him refusing to break. The movie strips away the tournament structure of the series and builds toward one mountain stage where everything the team has learned crashes into rivals who won't give an inch. By the finish line, you understand why these kids chose to suffer on bikes instead of living normal summers.
Onoda Sakamichi and the Souhoku cycling team get the call to race in the Kumamoto Hi Province Mountain Range Race, a grueling late-summer competition that draws the nation's fiercest cycling squads. Hakone Academy arrives hungry for redemption after their previous losses, while powerhouse teams from Kyoto and Hiroshima bring their own fierce strategies. But the real wild card is Kumamoto Daiichi High School, led by the talented and unpredictable Shin Yoshimoto, a rider whose aggressive style threatens to shake up everything the Souhoku team knows about competitive cycling. On unfamiliar mountain terrain, Sakamichi and his teammates must push past their physical limits while navigating unexpected rivalries and shifting alliances. The race becomes less about crossing a finish line and more about what each team discovers about itself when tested against opponents who refuse to back down. With new competitors comes new pressure, forcing Souhoku's cyclists to dig deeper than they've ever gone before and prove whether their bonds can survive against the best teams in the country.