When 10-year-old Ben Tennyson discovers a mysterious device, he gains the power to change into ten different alien heroes, each with uniquely awesome powers. With such abilities at his disposal, Ben realizes a greater responsibility to help others and stop evildoers, but that doesn't mean he's above a little superpowered mischief now and then.

A year after the events that took place during the "Final Battle" and equipped with an all-new completed Omnitrix, 16-year-old Ben Tennyson has to face new enemies.

Keď desať ročný Ben Tennyson objaví záhadné mimozemské hodinky Omnitrix, získa schopnosť premeniť sa v jedného z desiatich úžasných mimozemských superhrdinov.

With his secret identity now revealed to the world, Ben Tennyson continues to fight evil as a superhero with the help of the newly acquired Ultimatrix.

Five years later, 15-year-old Ben Tennyson chooses to once again put on the Omnitrix and discovers that it has recalibrated and can now transform him into 10 brand new aliens. Joined by his super-powered cousin Gwen Tennyson and his equally powerful former enemy Kevin Levin, Ben is on a mission to find his missing Grandpa Max. In order to save his Grandpa, Ben must defeat the evil DNAliens, a powerful alien race intent on destroying the galaxy, starting with planet Earth.