The relaunch of Doctor Robotnik's new Death Egg has gone wrong. The spaceship has fallen out of orbit and has plummeted down onto the mystical Floating Island and crashed in the Icecap Zone. Guardian Knuckles the Echidna investigates, following a remote camera to the trapped body of Robotnik, who warns him that his foe, Sonic the Hedgehog, wants to steal his Chaos Emeralds.