After defeating the Mechtogan that appeared in Bakugan City, temporary peace arrives. The peace is not meant to last long though as a new danger known as Wiseman arrives. Armed with his Nonet Bakugan (evil Bakugan he has released from the Doom Dimension), Wiseman hopes to destroy all peace that exists between humans and Bakugan. Seeing no choice, the Brawlers and their new ally Reptak enter into battle with Wiseman, but once the battle begins, Reptak notices Wiseman's style is similar to his missing partner: Gunz. What could this connection be? Will this connection harm the universe?