In the volcanic mountains of Kapecapek, Speed is competing in the most unusual race of his life. Kadar and his men find diamonds encrusted in the mountain wall. A creeping vine grabs his men (who escape), while Kadar holds Kabala at gunpoint. Speed throws a knife knocking the gun out of Kadar's hand. A fight ensues and Kabala's mask falls off, revealing Racer X. Racer X is about to give Speed an explanation when the ground caves in. Kadar and his thugs leave with the Kapecapekian treasure.
Speed and Racer X find a way out. Racer X tells Speed that the real Kabala taught him "tricks on how to race on tortured roads and broken trails." Once Racer X turned professional, he had a race with his mentor, who, unfortunately, fell victim to a landslide. To return Kabala's kindness, Racer X disguised himself as Kabala to protect the Kapecapekian treasure.
Kadar and his men succumb to the lava flow. Speed, followed by Racer X, exits the mountain just as it erupts and seals the split.
Speed vai à Kapetec, uma antiga civilização, para participar da perigosa Corrida do Fogo. Se o piloto nativo, Kabala, vencer a prova dentro do vulcão, as fronteiras do país continuariam fechadas. O caso é que alguns corredores entraram na corrida para roubar os tesouros da antiga civilização.
火山の噴火と共にレースが開始。火山の下を通る地底コースを進むマッハ号と世界の有名レーサーたち、そして「インカの呪い」の黒いマシン。そこは溶岩が流れ、人を襲う古代植物が生息する地獄のようなコースだった。
