Ayoungboytakeshismother’splaceinagroupofgemstone-basedbeings, andmustlearntocontrolhispowers.ThisseriesissetinthefictionalBeachCity, whereagelessalienwarriors, theCrystalGems, liveinanancientbeachsidetemple, protectingtheworldfromevil.Theyprojectfemalehumanoidformsfrommagicalgemstonesthatarethecoreoftheirbeing.TheCrystalGemsareGarnet, Amethyst, PearlandSteven, ayounghalf-human, half-Gemboywhoinheritedhisgemstonefromhismother, theGems’formerleaderRoseQuartz.AsSteventriestofigureouthispowers, hespendshisdayswithhishumanfatherGreg, hisfriendConnie, otherpeopleinBeachCity, ortheotherGems, whethertohelpthemsavetheworldorjusttohangout.Heexplorestheabilitiespasseddowntohimbyhismother, whichincludefusion(theabilityofGemstomergetheiridentitiesandbodiestoformanewandmorepowerfulpersonality).