One sunny day at noon, our hero, Sonic the Hedgehog, is taking a nap on the shore of Northern Island, when he was awoken by a floating sheet of paper, landing on him. It is a letter from his arch-nemisis, Doctor Ivo 'Eggman' Robotnik, in which he claims to have created a weapon of mass destruction, capable of burning down the whole planet and the only way for Sonic to 'stop' this weapon was to collect and bring all of the 7 Chaos Emeralds, ancient artifacts of near-infinite power, directly to Robotnik before 3 days pass. If Sonic failed to do so, Robotnik would launch his weapon, destroying the entire planet, and build his empire from the ashes. Thus begins a new adventure for our heroes..