Beneath the pyramid where Tiga defeated Melba, a purple-black rift in space and time suddenly appeared. The lingering soul of North, a giant from another dimension, unexpectedly took up residence in the body of researcher Ling Ye. Shadow monsters followed one after another, and Daigu and Ling Ye fought side by side with the power of two lights, uncovering the secrets of the ancient past and their fated connection to space and time. As a shadow demon calamity swept across the globe, the two Giants of Light wielded their convictions like blades, protecting Earth and the eternal order amid the collapsing rift between worlds.