The main character, Gun, rides a customized Honda CB750F cafe racer and eventually evolves into a pro road racer.

The film is about 4 high-schoolers who are bike racers and illegally partake in races at night on public roads.

Freelance photographer Kouya Madoka is in the midst of a slump due to a certain reason. While working on a story at the Fuji International Speedway, he meets the high school F4 racer Haruka Asahina and he suddenly finds his heart racing once again. He decides to support Asahina and help him make his dream come true with the small team, Komaki Motors. With this, the lives of Madoka and Asahina, who have completely different personalities and ages, intersect with each other.

Year 202X. Self-driving electric cars have replaced internal combustion engine-based cars, becoming ubiquitous in Japan. However, a racing circuit known as MFG, which employs traditional internal combustion cars, is garnering popularity worldwide. Kanata Livington, a 19-year-old Japanese-British racer, comes to Japan after graduating from a top racing school in the United Kingdom to take part in MFG and find his missing father, Ken Katagiri. Kanata moves to the home of his late mother's friends—Mr. and Mrs. Saionji—and enters the race under his father's surname, borrowing a Toyota 86 from Ogata, the couple's family friend. Despite the overwhelming disadvantages in specs, Kanata makes it to the top 15 while racing top-tier supercars, demonstrating his phenomenal skills. Takumi Fujiwara, the legendary downhill and rally racer, turns out to be Kanata's trainer. MFG employees who are familiar with Fujiwara and former racers from the same generation begin to notice Kanata. A new whirlwind is about to set off at MFG.