One of Ben's aliens decides to leave the Omnitrix and take over the world but needs to merge with Ben to become whole.
As Gwen applies to the prestigious Bancroft Academy, the Circus Freaks attack it for some quick cash. Ben changes to Ghostfreak to fight them, but when he changes back to Ben he discovers Ghostfreak has escaped the Omnitrix and wants to rule the world. Now, Ben must fight against one of his aliens.—Jesse Sanchez