stronaut Major Robert Gaines is the latest to orbit the Earth but something happens while there. Ground control loses all contact with him and although he returns safely, he apparently blacked out and has no recollection of what may have happened. Nor can he explain how the craft landed on land - completely undamaged - when it was meant to splash down in the ocean. When Gaines returns home he finds that little things are different: he's now a full colonel and has been for some time; his house now has a picket fence; he no longer seems to take sugar in his coffee; and even his wife senses he is different after she kisses him. It is soon apparent that Gaines has returned to an Earth in an alternate universe.

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