With the Astro Megaship trapped in a dangerous forcefield, preventing the Rangers from accessing it, Alpha 6 is forced to protect the vessel alone against Ecliptor! Though the automaton assistant puts up a tricky series of successful defenses to keep the evil robot from overtaking the Megaship, Ecliptor manages to discover the location of the Mega V launchbay! He not only heads to the Jupiter moonbase intent on destroying the Zords, but gets a major firepower-up in the process. Can the Rangers stop him before he leaves them defenseless?