Passion... out of this world! "It's unbelievable," John Gellian told Dane Belfast, "but a scientist has changed the sex genes! He's created a group that look and talk and act like us—but aren't us. They're a superrace and their object is to rule the world! Will you help us destroy them?" Dane Belfast looked skeptical. "Where are these superhumans? Have you ever seen any?" he asked. "I've sen one," Gellian said. "A beautiful girl named Nan Sanderson. She must be killed!" Neither man suspected the truth: Dane Belfast was one of the supermen—and he found it out with Nan Sanderson in his superarms!