The adventures of eighteen -year-old Ben Tennyson, wielder of the Omnitrix, an extremely powerful watch-style device that allows Ben to change into a multitude of various aliens; each with their own special abilities and skills. The storylines alternate between that of eleven-year-old Ben and eighteen -year-old Ben. After Gwen leaves for college and Kevin leaves to be closer to her, Ben reunited with his girlfriend gets a new partner, a rookie by-the-book alien plumber named Rook Blonko mission to explore a secret underground alien city named Undertown, Ben explores the quirkier side of things in the alien underground and discovers that enemies from his past are looking for a rematch.
1 part