airplaneshavereplacedcars,numbershavereplacednames,pillshavereplacedfood,government-arrangedmarriageshavereplacedlove,andtesttubebabieshavereplaced...well,yougettheidea.Scientistsreviveamanstruckbylightningin1930;heisrechristenedSingleO.HeisbefriendedbyJ-21,whocan'tmarrythegirlofhisdreamsbecauseheisn'tdistinguishedenough--untilheischosenfora4-monthexpeditiontoMarsbyarenegadescientist.TheMarsJ-21,hisfriend,andstowawaySingleOvisitisfullofscantilycladwomendoingBusbyBerkeley-styledancenumbersandworshipingafatmiddle-agedman.