With the Paradox Prism in his hands, Nine begins building the Grim into his own personal paradise - unless Sonic and Shadow can convince him otherwise.
Reality will cease to exist unless a selfless hero makes the ultimate sacrifice. But will it be enough to reverse the damage Nine caused to the universe?
The Chaos Council returns to New Yoke City more powerful than ever, forcing the rebels to come out of the shadows and bring a fight to their front door.
To get help in the fight against Nine and his winged lackeys, Sonic heads to New Yoke and forms an allegiance with the very last people he ever expected.