World domination is within Sludge's grasp. Dez leads the newly-formed mutants and they capture Racer X, who drops a tracking device before he is taken away. Speed happens upon the place where Racer X was kidnapped. He picks up the tracking device. Speed finds the toxic waste plant where Racer X is held as Sludge is working on the third mutagen formula which can fuse the genes of a human with the genes of another living creature.
Speed meets the four mutants.
He takes off outta there. Pops radios with some good news and some bad news. The good news being the Dr. McAllister has the genetic stabilizer. The bad news being that the lab is under attack by some giant vines. As Speed approaches the lab, the Mach Five is snarled in the vines.