A team of intergalactic warriors fights to protect the Earth, but the combination of three highly trained beings and one quirky young boy leaves the team struggling to overcome the dangerous scenarios that are put in front of them.

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).

5000 years after a great war of Gems, gemstone-like beings from a planet called Homeworld, we meet Steven, a half boy half gem who lives with the "Crystal Gems" Garnet, Amythest, and Pearl, who live on earth after they rebelled against Homeworld. The story follows Steven's adventures, whether he is fighting monsters or learning to control his own powers.—Stevie Lee Silverman

Steven Universe lives with the Crystal Gems: Garnet, Amethyst and Pearl. Being half-Gem and half-human, Steven's mother, Rose Quartz, 'sacrificed' herself to give her son true form, and to bridge the gap between Gems and humans through his father, Greg Universe. Steven and The Gems live in Beach City, and together they protect their town from the Gems' planet: Homeworld. Steven must master his mother's powers and will become something greater than himself: a hero who fights for what is right.—Johnny