Sonic and Julie-Su have been abducted by Knuckles? father, Locke, who wants them to find the one weapon that will destroy Enerjak. But why don?t they want to use it? And can they even get a shot in edgewise as Enerjak and Dr. Eggman?s army square off? It?s a clash of the villainous titans that?s sure to rock Sonic?s world!