The adventure begins as Sonic races to protect the world from bad guys old and new! 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 doctor 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 the Lemur and Whisper the Wolf.
As Sonic and the Chaotix struggle against dangerous robots… Wait, what are Shadow and Rouge doing here?! Banding together to figure out Dr. Eggman’s next scheme, Sonic and the Chaotix follow their last lead into a rain-drenched secret base full of dangerous robots. As the situation quickly turns scary, they must ask themselves: Will they find the answers they’re looking for? Or have they walked right into a trap set by Dr. Eggman? But that’s not all! Everything gets even wilder when Shadow and Rouge arrive, leaving our heroes wondering whether they’re here to lend a hand…or make things even more dire for our heroes.