A retriever who specializes in obtaining rare goods comes after the Omnitrix, dimensionally separating the Omnitrix and a part of Ben. Ben is sent elsewhere, fighting to survive, while his friends try to figure a way to bring him back.

Kevin is beginning to lose all hope that he will someday return to his human self. He then meets a girl who doesn't seem to mind the form he is in. Kevin finds himself under her spell, quite literally, as Charmcaster has come back to exact revenge on Ben and Gwen. Kevin, under Charmcaster's spell, has no choice but to obey his master and destroy Ben and Gwen.