The space pirates of Uralia, led by its ruler Boris Zandrozov, stole valuable anti-gravity fuel throughout the galaxy. They evaded capture by retreating to their base on the moon, where their enemies' strasosphere ships were not equipped to go. The Solar System Cabinet assigned Tarka, the Crusader from Mars and Zira to deal with them. Disguised as the deserter Lieutenant Akra, Tarka infiltrated their organization and lured them to Iapetus, moon of Saturn. He then had Zira send the moon out of orbit, dodged the Uralian pirates until they ran out of anti-gravity fuel, and tricked them into crashing into it. After Zandrozov's death, a new democratic government took over on Uralia.