The final battle for the fate of the world of the Air Trecks is underway, pitting Ikki and Ringo against Sora and Rika! It's a white-knuckled, no-holds-barred race to the surface through the massive Tower of Trophaeum, and now that the best riders on the planet are finally facing off, victory will only come with great sacrifice. But when Sora reveals a stunning secret, Ikki realizes that the game has changed, and winning is more important than even he could have imagined...