A。young。boy。takes。his。mother's。place。in。a。group。of。gemstone-based。beings,。and。must。learn。to。control。his。powers. This。series。is。set。in。the。fictional。Beach。City,。where。ageless。alien。warriors,。the。Crystal。Gems,。live。in。an。ancient。beachside。temple,。protecting。the。world。from。evil.。They。project。female。humanoid。forms。from。magical。gemstones。that。are。the。core。of。their。being.。The。Crystal。Gems。are。Garnet,。Amethyst,。Pearl。and。Steven,。a。young。half-human,。half-Gem。boy。who。inherited。his。gemstone。from。his。mother,。the。Gems'。former。leader。Rose。Quartz.。As。Steven。tries。to。figure。out。his。powers,。he。spends。his。days。with。his。human。father。Greg,。his。friend。Connie,。other。people。in。Beach。City,。or。the。other。Gems,。whether。to。help。them。save。the。world。or。just。to。hang。out.。He。explores。the。abilities。passed。down。to。him。by。his。mother,。which。include。fusion。(the。ability。of。Gems。to。merge。their。identities。and。bodies。to。form。a。new。and。more。powerful。personality).