Sho, an avid MTB enthusiast, frequents the X-Zone practice field with his friends Takumi and Makoto. When the renowned “Shark Tooth” MTB team challenges them, vying for the X-Zone, Sho's determination to protect his cherished memories of bonding with his late father drives him to compete. However, a mysterious turn of events transports Sho, his friends, and his MTB, “Flame Caesar,” to a different realm during the critical race. Tasked with collecting 10 emblems through victories in the high-stakes MTB competition known as the “Idaten Battle,” Sho navigates treacherous terrains like volcanoes, ruins, and snowy mountains. Will Sho triumph in the race against formidable opponents to secure his passage back to his own world?