It seems a very gifted and mysterious Bakugan player named Masquerade has been stealing Bakugans from kids all around the world. When Dan hears about this through his friends on the web, he decides to put an end to it and challenges Masquerade to a battle. The two meet under a railway bridge and the fight is on! But Masquerade has a secret weapon called a Doom Card which sends it opponent to its final demise. Dan loses twice and if he loses again, his Dragonoid is lost forever!