Alpha 5 is depressed after recieving a distress signal from his creator, King Lexian, deposed ruler of the peaceful planet called Edenoi. Edenoi has been taken over by the evil Count Dregon and his minions. As a favor to Alpha, the Power Rangers take a trip across the galaxy to Edenoi (sans Kimberly, who is currently bed-ridden with the flu). Once there, they bump into Dregon's Plague Patrol. If that wasn't bad enough, the rebels fighting against Dregon's forces, led by a powerful superhero named Masked Rider, think the Rangers are bad guys!