Four thousand years have passed since the Sarnians conquered the Earth. The only one of the conquerors, the Supreme Ruler Mother Sarn remembers the times of fierce battles, and she is the only one who sees that the earthlings have changed a lot since then, have mastered telepathy and have again become worthy rivals of the Sarnians. But the Ruler is especially concerned about a man named Ezir... Action-packed fantasy from John Campbell, a writer and publisher, the father of the “golden age” of American science fiction.