Queen Anyana is leader of the country of Delonia on the planet Pluto. Two space traders, Wix and Gurkus, have taken over Delonia. The Space Rangers, including Rex Clive and Speed Lansing are sent with their scoutcrafts in the cargo hold of a massive ship called the Solario, it is threatened by Wix, the self-proclaimed ruler of Pluto. Wix blows up the Solario, unleashing the Space Rangers on the would-be despot's ragtag group of spacecraft. The Space Rangers handlily destroy Wix's fleet. Things work out as well for Gurkus as the failed Wix. Rex and Speed are welcomed to Pluto by Queen Anyana.; The Space Rangers run across a scheme by Soq to steal methane shipments from Jupiter. The unmanned cargo craft seemingly explode in the asteroid belt, yet Soq and his daughter Kara are behind it.; Tyranno, with his assistant Fodor, operates a plan to take over the governorship of the planetary system from one of Jupiter's moons, Ganymede. To do so, he uses radar to trick the Staritania to Jupiter. Rex Clive concocts a means by which the Star Rangers can escape Jupiter's heavy gravity with the Staritania. The Space Rangers permanently subdue Tyranno when they blow up his spacecraft.; Newlyweds Jak and Maida Barv go to Decima, the tenth moon of Jupiter, to run an iron mine. They are alone except for the robot labor force, Jak's assistant, Greg Dant, leaving before they arrived. A robot tries to kidnap Maida, forcing Jak to attempt to fight it off. The robots get belligerent. Jak must fight for them. Jak hears Maida cry for help as she is kidnapped by a robot. He runs to save her. Throwing a large boulder at a robot, Jak finds out that Greg Dant is disguised in the robot skin. He controlled the robots by short wave. Dant had found gold and attempted to get rid of the Marvs.; Captain Norgo is attempting to smuggle a powerful alcohol called Fluvia to Mercury. Fluvia is illegal on the planet of destination. Space Rangers Barry and Jones investigate his ship, but are locked in the cargo hold. They dump Fluvia from the cargo into the ship's engines. The Fluvia causes the ship to veer from course. It is then intercepted by Adjutant Lansing.