Runo suspects Alice is secretly spying on the Brawlers and giving information to Masquerade. However, Julie suspects Shun is the real mole on the team. All this distrust puts a strain on everyone and it begins to affect their judgment and their battles. Things come to a head when Dan and Runo face off against Nene, Akira and Shuji, three very skilled but annoying Bakugan players. It's only when Alice steps in as playmaker for Dan and Runo that they realize they should be looking outside the team and not blaming each other. Meanwhile, across town, Marucho has made a startling discovery. Someone has been hacking into the Brawlers' website and stealing information. It's not Webmaster Joe or a member of the team, as he originally suspected. So, if all the usual suspects are innocent then who is spying for Masquerade?