At the same time, they must enlist the help of the Plumbers' kids (children or grandchildren of retired Plumbers which are commonly half human and half alien) and repel attacks from a new enemy, the Highbreed. His adventures all done, Ben has taken off the Omnitrix and has grown from a young boy into a confident teenager however, the mysterious disappearance of Grandpa Max makes Ben put the Omnitrix back on, as well as forcing him his cousin Gwen and his old enemy Kevin to search and locate Grandpa Max.
Five years after the Original Series, 15-year-old Ben Tennyson has returned to a normal, everyday life.
