The drivers enter the Water Realm where former surfer Vert, racing in his own element, is determined to prove that he's still a champion. But after a devastating attack by the Racing Drones, he ends up being the first driver to fail. In the Metro Realm, the drivers have to find their way through an eerie deserted city choked with traffic. The racers are also introduced to a new weapon developed by the Racing Drones: a huge car-eating "Sweeper. We also get a glimpse of the mysterious fourth team, the Silencerz.