As it appears that the FD vs. Supra battle is giving no quarter, the question is, is it possible for Keisuke to hold off Minagawa's professional pressure? Meanwhile a new racer appears on the slopes of Hakone, and its evident he wants to kill himself, and take anybody with him!

Keisuke's next opponent in Kanagawa's Four Lines of Defense is the leader of Team Spiral, Ryuji "Zero" Ikeda. Ikeda believes in his "Zero Theory", where the driver thinks of nothing except being one with the car to create the ultimate racer. Quite similar to Ryosuke's Fastest Racer Theory, Ryosuke also notices a few flaws in Ikeda's theory. A flaw that would arise as the wet conditions create a fog battle.

The downhill battle between Takumi and Hiroya "Zero 1" Okuyama's S15 starts, with Okuyama waiting to attack until the later section because of the fog. However, he hasn't considered the ability of Takumi's adaptibility skills. Whilst this is on, another battle is in the midst: Ryosuke's inevitable battle with the driver known as 'Shinigami', Rin Hojo.