It's been a few weeks after Eggman's attempt to destroy the Sonic Heroes, but failed miserably. After that defeat a strange dark voice and device appears in front of Eggman, Mephiles and their forces. Meanwhile with our heroes Tails receives a strange signal coming from his computer and the hedgehogs and some of their friends come to see. Then the computer sucks Sonic, his brothers, Tails, Wiley, Vixy, and Rita into it. Will our heroes get home??? Will they also make new allies as well??? Tune in to find out!!!!!