While camping, Ben uses one of his alien forms to play a prank on some Bigfoot enthusiasts and accidentally stumbles on what he, Gwen and Max believe to be the real Bigfoot. Ben Tennyson isn't your average 10-year-old...he's also the wielder of the the Omnitrix, an alien device that allows Ben to shift into 10 different alien forms from around the galaxy. Together with his cousin Gwen and his Grandpa Max, they protect the world from alien incursions...