With the Astro Megazord pinned down and running low on power, the Rangers journey to one of Jupiter's moons, using the Key Cards that Andros won to track down a set of Zords hidden there by Zordon. They meet resistance from Astronema and her Quantrons, but fight their way to the access bay of the incredible Mega V Zords! Even with their new Megazord combination, the Mega Voyager, can the Rangers hope to defeat the monstrously mutated Darkonda and his mindless spawn Mutantrus?