After his failure on Little Planet, Robotnik has created a device that will transport him and his army to Earth. Sonic and his friends go to stop him, but due to Sonic's recklessness, the device broke and took not only Eggman and his forces, but also the entirety of Sonic and his friends to Robotnik's home world: Earth! Sonic, Tails, Amy and Knuckles will have to scour the city to find not only the seven Chaos Emeralds they lost, but also their friends AND Eggman before he uses the Emeralds to release an ancient being powerful enough to level a city! But as they go on this adventure, they learn more of the secrets behind that creature, known as Chaos, the Chaos Emeralds, and Knuckles' people the Echidnas. Will Sonic find his friends and save Earth from Destruction? Or has Eggman got his revenge?
