The Tennysons meet up with another old friend of Grandpa Max, this time, a descendant from the Native American Navajo tribe, Wes. There, Ben finds his granddaughter, Kai, whom he gets a crush on. Meanwhile, a strange storm appears, and a lightning reveals a giant werewolf looking figure in front of Ben. Wes suspects that it is the legendary Yenaldooshi, and he wants to take it down before it can do any harm to the villagers. As Ben, Grandpa Max, and Wes head out to catch it, Ben, as Wildvine, struggles to fight it. Wildvine is turned back into Ben, and the wolf attacks, scratching his Omnitrix causing it to react wildly. Technically he may have not been bitten, but Ben is granted a new alien form, Benwolf.
