Five years after the original Ben 10 series, Ben Tennyson is a normal teenager who has put away his toys, including the Omnitrix that gave him his powers. Ben's life takes a turn when he is attacked by an alien and discovers that Brandpa Max is missing. To find his grandpa, Ben teams up with his cousin, Bwen, his grandpa's partner, Magister, and even his former nemesis, Kevin 11. When they discover the Forever Knights (a secret organization that deals in illegal alien technology) and DNAliens (the Highbreeds henchmen) are trading dangerous weapons, Ben decides to once again don the Omnitrix and he quickly learns that he can now transform into Ten New Aliens.