Picking up a few weeks after where Ben 10: Alien Force leaves off, Ben 10: Ultimate Alien follows the now sixteen-year-old Ben. The Omnitrix has been destroyed and Ben must learn to master the secrets of the new Ultimatrix, a gauntlet-like version of the old Omnitrix that not only gives him access to all of his original powers and abilities, but also allows him to evolve his alien forms into even stronger and even more powerful versions (called "ultimate forms"). In the premiere episode "Fame", a young ten-year-old fan named Jimmy Jones deduces Ben's secret identity and reveals it to the world. Ben becomes an overnight celebrity, hailed by kids as a hero but distrusted by most adults as a possible threat. With Gwen, Kevin and Grandpa Max still at his side, Ben continues to battle alien threats to the galaxy including finding five aliens that were attacked by a villain named Agreggor.