In the aftermath of his latest battle with Dr. Eggman, rogue robots are on the loose and new foes are on the rise. But where is the evil genius now, and what secrets will Sonic discover during his search? One thing's for sure: He'll need plenty of help from Tails, Knuckles, Amy, and new allies Tangle and Whisper. Plus, he'll have to deal with a little competition--from his old rival Shadow! It's an epic storyline Sonic fans can't miss, so don't get left in the dust. Gotta go fast!