A group of atomic researchers, Science Associates, is being decimated by remote control. The survivors suspect that the villain, calling himself "Dr. Vulcan," is one of themselves, bent on a monopoly of their technological wonders. Jeff King is assigned to safeguard the group's secrets; for a professor, he's very handy with his fists, and has the added advantage of a secret, experimental rocket suit that enables him to fly! But Dr. Vulcan has deadly devices also. Can the Rocket Man expose Vulcan without revealing his own identity?