Fifteen-year-old Ben Tennyson must utilize the Omnitrix yet again in order to locate his missing Grandpa Max, accompanied by his cousin Gwen and former enemy Kevin 11.Fifteen-year-old Ben Tennyson must utilize the Omnitrix yet again in order to locate his missing Grandpa Max, accompanied by his cousin Gwen and former enemy Kevin 11.Fifteen-year-old Ben Tennyson must utilize the Omnitrix yet again in order to locate his missing Grandpa Max, accompanied by his cousin Gwen and former enemy Kevin 11.