Vert and Kurt have teamed up and are now part of the street racers known as Teku. Meanwhile, Kurt's younger brother Mark and former Scorchers leader Taro are now part of the Metal Maniacs, who happen to be the main rivals of the Teku. A heated race between the two teams is cut short when Tezla calls on the help of his old World Race allies. It appears that Gelorum has returned. She has stolen the Wheel of Power and destroyed Highway 35 in the process. Tezla sends the racers, along with some of their new teammates, into the Racing Realms in hopes of retrieving the Wheel from Gelorum's clutches. They soon discover that the Racing Realms are unknown dimensions that are not only much more difficult than Highway 35, they're also very deadly. The situation isn't made any easier when Gelorum sends out her Racing Drones to destroy the Teku and Metal Maniacs.

Lani learns that Tezla has been purposely pitting the drivers who hate each other the most against one another in hopes of getting a stronger and more dedicated performance out of them. Meanwhile, Karma studies one of the Racing Drones and discovers their secret to dominating the Racing Realms.

The drivers enter the Neon Pipeline Realm where they have to master not only drafting, but also driving on the inside and outside of an elaborate network of pipes. The drivers discover the presence of the mysterious Silencerz team.

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Dune Ratz leader Kadeem nearly does the impossible and comes close to grabbing the Wheel of Power, which he hopes will let him win World Race and the prize that could help his people back home.

The five leaders for the World Race teams, Wave Rippers, Scorchers, Street Breed, Dune Ratz and Road Beasts, are chosen and are quickly sent into Highway 35 where their first challenge includes the lava-filled Volcano Track. But things heat up when Wave Ripper Lani Tam gets caught in the uncontrolable lava of the volcano.

Tezla finally gets his hands on the Wheel of Power but an invasion at the complex proves that someone else won't give it up with out a fight. Fortunately the World Race team leaders join forces to keep the Wheel of Power from falling into the wrong hands. A final showdown on Highway 35 ensues.

Mark Wylde faces off against his older brother Kurt Wylde through the very dangerous ice-covered mountains of Highway 35. It'll be a Wylde ride but which brother will come out on top?

Just as the teams get ready for the Greatest Challenge, a giant and deadly road blocking device, Kurt's younger brother Mark joins in on the adventure. But, as enthusiastic as Mark is, Kurt doesn't want his kid brother around. Fortunately, Vert is impressed by the driving ability of his rival's brother so he asks Mark to join the Wave Rippers.