Vilgax has beaten the heroes of ten planets and taken their powers as his own. Now he's looking for Ben.

Ben, Gwen and Kevin race to collect the Omnitrix's missing forms and make it to the battle with Vilgax on time. Meanwhile, Kevin discovers that his new transformation has some benefits.

Grandpa Max asks the team to investigate some strange desert activity, leading them to encounter Vulkanus and his incendiary plans for Earth's future.