Can Sonic outrun a virus that turns everyone into robotic zombies? The world has fallen to the Metal Virus, a manufactured plague that transforms all it infects into mechanized "Zombots" under Dr. Eggman's command. Even Sonic the Hedgehog has been infected, though his speed has allowed him to keep the virus at bay. Now, with the population more infected than not and the virus constantly spreading, Sonic and his friends in the Restoration launch a desperate plan!