Comm. Rex Clive, space king, and the Space Officers – Adj. Speed Lansing, Jim Jones, Bob Barry, and Stella Dawn of the STARs (the Space Transport Auxiliary Reserve) – have adventures in space as the champions of law and order. They are headquarted in New Minerva, capital of Earth (popularly known as Minerva), and they protect the spaceways of the solar system, flying the flagship Staritania. Note: The Space Officers are at first called the Space Rangers, but it is likely that the Space Officers (which have jurisdiction within the solar system) are a division of the Space Rangers (which have jurisdiction outside the solar system). Space Ranger Jim Jones is probably a descendant of Space Ranger Rocky Jones, who lived 300 years earlier. The United Worlds of the Solar System no longer exists, replaced by two factions often hostile to one another: the Inner Planetary Group and the Outerplanetary Circle. An international police force called the Lunar Squad has patrolled the Moon for centuries in order to ensure that no one nation on Earth controls it and uses it as a base for invasion. Venusia is the capital of Venus, which is ruled by the viceroy Drox. On Pluto, the ruler of the country of Delonia (one of many countries) is a humanoid named Queen Anyana. On Ganymede (Jupiter's largest moon), a dictator named Tyranno rules until his death in battle with the Space Officers. Callisto (Jupiter's second largest moon) is ruled by the caliph Zoq. Each of Saturn's nine largest moons are inhabited. Titan is ruled by Noxor. The element cosmium, which repels gravity, is discovered on Pluto; cosmium can be processed into a pure substance called gravitex. The planet Torro is the Fort Knox of the future. [Space Adventures #1-6, 19]
After Halgo – leader of the Outerplanetary Circle – attacks the Earth using the Moon as a base, Clive and the Space Rangers stop him and save New Minerva from destruction. In the process they also restore life on the surface of the Moon.
When communications with remote Pluto are reestablished after centuries of silence, Clive and the Space Officers liberate Pluto from a group of space traders who have taken over using a spacefleet of their own.
Clive and the Space Officers destroy the space fleet of Tyranno, dictator of Ganymede, after he tries to maroon the Space Officers on the red spot of Jupiter.
Clive and the Space Officers stop the plans of Zoq, the caliph of Calisto, to invade the inner planets of the solar system.
Clive and the Space Officers discover that the planet Marduk, existing outside the solar system and five times Earth's size, is a hollow world with an artificial satellite at its heart. They defeat and arrest Marduk's secret ruler, Karmud, who uses the planet to plunder passing ships and spaceliners.
Clive and the Space Officers stop the plans of Chief Delva, ruler of the humanoid Venusians, to invade the Earth.
Clive and the Space Officers defeat a group of space pirates led by Shangor who ransack the Earth-Mars shipping line from a hidden base in the molten side of Mercury.
Clive and the Space Officers repel an invasion of the planet Dox from its twin Zod, which both orbit the star Algol. In gratitude, Erda, leader of Dox's galactic expedition, has a ship – with an I.G. motor capable of attaining 100 times lightspeed – built for the Space Officers.
Clive and the Space Officers stop the plans of Titans' ruler Noxor to conquer Saturn's eight other inhabited moons.
Clive and the Space Officers capture Nucleo, the mad Martian and a master of disguise, when he steals a large amount of gravity-repelling gravitex from a processing plant.
Returning to Dox, Clive stops the plans of Choq, devil-master of Zod, to destroy Dox.
Clive and the Space Officers stop the Venusian invasion of Earth, led by Drox, viceroy of Venus.
Clive and the Space Officers stop the invasion of Earth by extraterrestrials led by Roj, operating from a dark planetoid.