Dr. Robotnik (Danny DeVito), a brilliant scientist, dreams of world domination and intends to accomplish this by using the six Chaos Emeralds, currently held on South Island, and which give legendary power. Dr. Robotnik builds a base on the island and begins turning innocent animals into robot slaves in order to achieve his goals. Sonic (Michael Jackson), a super-fast blue hedgehog, hears of these developments and get his friends; Miles “Tails” Prower (Macaulay Culkin), Knuckles The Echidna (Cam Clarke) and Amy Rose (Teri Hatcher) Although South Island is now infested with Dr. Robotnik's mechanical devices, Sonic and his friends has one advantage: Dr. Robotnik doesn't realise that the Chaos Emeralds are not on the island itself, but in a secret zone caused by its movement. Sonic and his friends set out to acquire the gems before Dr. Robotnik and confront him in order to restore peace to South Island.