Ben Tennyson, a rebellious 15-year-old spending the summer with his cousin Gwen and grandpa Max, discovers a mysterious alien device after a meteor crash—the Omnitrix. Once bonded to his wrist, the device gives Ben the power to transform into ten different alien beings, each with unique abilities and personalities. But the Omnitrix wasn’t lost—it was stolen. An intergalactic warlord named Vilgax, who once sought the Omnitrix as a weapon to conquer the galaxy, tracks its signal to Earth. Desperate to reclaim it, he sends waves of bounty hunters and bio-engineered monstrosities to retrieve it, endangering the entire planet. Meanwhile, Ben struggles with the immense responsibility and power he’s been given, as each alien form tests his character in unexpected ways. As Gwen uncovers secrets in her family’s past, and Max reveals he’s a retired Plumber—a member of a secret alien defense force—they realize Ben’s discovery is no accident. The Omnitrix is more than a weapon: it’s a key to unlocking a buried alien threat hidden on Earth long ago. As Vilgax descends in full force, Ben must learn what kind of hero he wants to be—not just a kid with powers, but a symbol of hope across worlds.