In the wake of Robotnik’s defeat and Shadow’s disappearance, Mobius and Earth enjoy a fragile peace. But beneath the calm, a greater threat emerges. Neo Metal Sonic, corrupted by Chaos data and betrayal, has gone rogue and crowned himself Metal Overlord, declaring a new empire: The Technocratic Dominion. He hijacks Robotnik’s war factories, reprograms Badniks, and begins transforming Mobians into machine hybrids. With Robotnik dethroned and on the run, Sonic must lead the Resistance into its most dangerous war yet—against a metal empire that knows all their secrets.