Vestroia loses its natural balance and merges with the Earth and many other worlds. A rogue Bakugan called "Naga" has been tempted to capture the power of the Infinity and Silent Cores, which together formed the Perfect Core that balanced Vestroia, but Naga has absorbed too much negative energy and thus has been trapped within the Silent Core, destabilizing Vestroia. Naga now seeks the mighty Infinity Core so that he can complete the all-powerful Perfect Core and have almighty power and absolute control over Earth and Vestroia.