Unless life itself is a pathetic cosmic accident, man cannot be the only intelligence in the universe. It is unlikely that man is the highest intelligence. Compared to other planetary systems, our solar system is quite young. Its raw materials have barely been touched. If older intelligences wanted those raw materials only the primitive mind of man would stand in their way. Our so-called defences would perhaps aid the aliens more than aided us... Ken Andrews was a research worker in electronics. He had a sensitive mind and a vivid imagination. When he has a strange experience with the radar-screen his chief said he had been overworking. His doctor explained it as hallucination, but the so-called delusion persisted. If Ken Andrews was sane his world was in danger.... If he really was in communion with an alien intelligence, could that alien intelligence be trusted? The intriguing thought behind this story is that it could be "true." It could happen "today" or "tomorrow" ...." It might even have happened a few minutes ago" in a top-secret research station somewhere in England...