It was, as usual, a decision on which the question of peace or atomic war depended. The Council of the Western Defense Alliance, as usual, had made the decision. And, as usual, the WDA Coordinator had to tell the Com Ambassador that the Coms had won again. The WDA would not risk atomic war over a minor boundary. Some hundreds of light-years away, the Survey ship Lotus floated in space over the third planet of the system, a planet exactly like Earth, only there was absolutely NO life on it.
The loss of solar heating has caused the Earth's atmosphere to freeze into thick layers of "snow". The boy's father had worked with a group of other scientists to construct a large shelter, but the earthquakes accompanying the disaster had destroyed it and killed the others. He managed to construct a smaller, makeshift shelter called the "Nest" for his family, where they maintain a breathable atmosphere by periodically retrieving pails of frozen oxygen to thaw over a fire.
Why did everybody step off the ship in this strange valley and promptly drop dead? How could a well-equipped corps of tough spacemen become a field of rotting skeletons in this quiet world of peace and contentment? It was a mystery Peter and Sherri had to solve. If they could live long enough!
Was it a wild talent that MacReedy had, or was it just prophetic genius that led him to figure out new, improved ordnance weapons and make models of them--before the armed forces had them? Whichever it was, MacReedy was both valuable and dangerous--and when the general saw MacReedy's final figure, the weapons following the mobile rocket A-missile launcher....
The problem of separating the friends from the enemies was a major one in the conquest of space as many a dead spacer could have testified. A tough job when you could see an alien and judge appearances; far tougher when they were only whispers on the wind.