Lazy, unambitious repairman and UFO enthusiast Des Kinvig encounters a spaceship captained by the beautiful Miss Griffin from Mercury. Or is it all just the fantasy of a man having a quiet breakdown?

Des Kinvig, owner of a backstreet electrical repair shop and part-time UFO nut, discovers that one of his customers, the beautiful but fiery Miss Griffin, is really an emissary from the Planet Mercury who has come to Earth to help prevent an invasion by the evil alien Xux... or is it all part of Des's fevered imagination?—Anonymous