An abandoned military base leads to an encounter with a self-proclaimed hero and a mysterious creature that ages people and objects. The team must stop the creature and help the hero who claims they've met before and will meet again.
Though Ben's team fails to stop the DNAlien Fleet from arriving, re-enforcements arrive, but this battle can't be won on Earth. A small group goes to the DNAlien home world to force its leaders to stop the invasion.
During battle, Ben and a HighBreed commander are teleported to a distant world. They must put their differences aside if they're going to have any chance of finding a way to return to Earth.
Paradox and Azmuth arrive with grave news: The DNAliens are ready to make their move. While Gwen and Kevin gather help, Azmuth reveals some secrets of the Omnitrix and its true purpose.
Ken, Gwen's brother, stops in a small town for engine repairs and disappears. Grandpa Max arrives first to find him, Ben and the others soon after. They learn more about the alien conspiracy, and a heavy price will be paid to stop it.