Bens childhood crush, Kai Green, asks Ben and Rook for help when her grandfather is kidnapped by the Forever Knights who are after a mysterious sword.\r \r Watch more Ben 10: Omniverse on Cartoon Network!\r Watch more videos and play Ben 10: Omniverse games: \r \r Watch more videos on the go, get the Cartoon Networks Watch And Play app here:\r \r \r Check out our Cartoon Network Facebook pages:\r \r
