When Luthor escapes from jail, he challenges Superman to meet him in a fair fight without his super powers. The two head to a desert-like world where they brawl until Superman knocks out the villain. Luthor retaliates by using secret weapons hidden in his shirt pocket.
While Superman struggles to survive, Luthor meets the few remaining inhabitants of the planet and becomes their hero when he reactivates their scientific machines and temporarily solves their water shortage problem. But Superman finds Luthor, defeats him in combat, and returns him to prison on Earth, after providing the people of the planet with sufficient water on which to survive.