After traveling through an anomalous funnel cloud, Captain John W. York of the Space Exploration Federation and his assistant, Edna, a very beautiful and sophisticated android, a creation of Captain York's friend, Doctor Reuben, have landed on an alien world in a planetary system previously unexplored by anyone from Earth. They leave their craft near a large crater that dwarfs Arizona's Meteor Crater, and it is here that they have chosen to explore, intending to stay only a few days, as they are on a ten year mission and have many more worlds to discover. Barely have they set out when Edna begins exhibiting some questionable behavior for what Captain York would expect from his android. He hopes she is not malfunctioning, for his very life depends on her. She is his crew, his pilot, and his only ticket back home. He cannot operate his ship without her.

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