Ben Tennyson, a 15-year-old boy, discovers a magical device that can turn him into 10 different alien heroes, each with its own unique abilities. With this newfound power, Ben, Grandpa Max and cousin Gwen help others and stop evildoers - but that doesn't mean he doesn't cause some super-powered teen mischief once and a while.
Although Ben's ready to work alone, Grandpa Max teams him with a new, by-the-book partner. Along the way, Ben discovers enemies from his past looking for a rematch as well as a new batch of aliens to battle. While Ben is busy dealing with the aliens, a mysterious hunter is hot on his trail.
