When Dr. Eggman tries to take over the world again, it's up to Sonic and his friends to save the world as Sonic also has to take on the mysterious hedgehog known as Shadow, who has a dark past to him. But a team of supervillains consisting of Deadshot, Captain Boomerang, Heavy, Screaming Mimi, Blockbuster, Pyro, Demoman, Spy, and Kangaroo are sent in by the government are also in pursuit of both Eggman and Shadow.
