As Kai explores the mysterious Russian abbey, he realizes he was trained there as a child. Boris, the leader of the abbey’s secret Beyblade facility, entices Kai to return and join the Demolition Boys, the abbey’s specially trained uber-team. Kai is tempted by the taste of supreme power and the ultimate prize of the Black Dranzer, the most powerful Beyblade ever built. Turning traitor, Kai becomes a pawn in Boris’s plot to brainwash Beybladers and take over the world. As the World Championship nears, the Bladebreakers’ strongest player becomes their most dangerous enemy. Kai turns on everyone and everything that matters, driven only by the thirst for power and perfection. Who will win Kai’s loyalty...the dark side or the Bladebreakers?