Basedinthenearfuture-whereasupersecretmilitaryorganizationSHADO(SupremeHeadquartersAlienDefenseOrganization)becomesoperational.Itspurpose,todefendEarthfromanAlienrace,whichhasbeenabductinghumansfromallcornersoftheplanetfordecades.SHADOscoverisaLondonmoviestudiowheretheirmainheadquartersarehiddendeepbelowthesurface.SHADO,runbytheextremelydedicatedStudioMogulandSHADOCommanderEdStrakerhasacadreofcrackoperativeswithanarsenalofcuttingedgefuturisticweaponssystemsandhiddenbasesonearthandbeyond.UFOisthefirstinatrilogyoftent-polemoviesbasedonthe1970scultTVshow,UFO,createdbyGerryAnderson.