The vast power source found within Yukio's final form gives humanity a glimmer of hope toward securing Earth's safety. But on their way to a new village, Tetsuo and Yukio encounter a giant robot. What's more, this robot looks exactly like Yukio, but with black hardware! Will this unknown machine prove to be friend or foe? Then, Earth's icy battle heats up as one of the strongest kaiju smashes its way toward Tetsuo's crew from belowground!