20 years in the future and world domination is nearing due to 7 killer robots that were built by the successor of the evil Dr. Eggman. The robots cause destruction and death to the world, and the government of Silver's world are at Defcon Omega, which the only ways to get out of that level of security is surrendering or Nuclear Warfare. And surrendering isn't the most wise decision...The Advisor of Defense calls upon Silver who can travel through time to bring 4 people back and those people are Sonic the Hedgehog, Shadow the Hedgehog, Knuckles the Echidna, Miles Tails Prowler. They know the power of the CHAOS EMERALDS...Only the Chaos Emeralds which can unleash ultimate power when it's in the right hands, and can befall destructive darkness when it's in the wrong ones can stop the robots, bring down Eggman, and save the world. But finding them isn't easy. Some supernatural power scatters them across the world every year or so. Eggman's successor is also pursuing the emeralds, for he wants what every powerful man in the world wants...more power. Silver's team spreads around the world, and calls on friends to make the search less arduous and long. But the robots easily find them and races the team of heroes for the Emeralds and for their survival...Can our heroes find the Emeralds before they face total annihilation?