The third novel in the Myles Cabot "Radio Man" series. Myles Cabot, a radio expert, who has married Princess Lilla, the queen of Cupia on the planet Venus, returns to the earth for a visit. When Princess Lilla sends an SOS, Cabot starts back to Cupia by wireless but a thunderstorm throws him off course and he lands on a different continent where he is confronted by his old enemies, Prince Yuri and the Formians, the giant ant-men of Venus Illustrated.