Sonic is continuing his journey across the Floating Island. He has just downed Doctor Robotnik's relaunching Death Egg, but it is still functional and could be launched again at any time. Sonic is also attempting to convince guardian Knuckles that he isn't after his Chaos Emeralds. Soon, all becomes clear when Robotnik betrays Knuckles and steals the Master Emerald. Knuckles stops harassing Sonic and leads him to the Sky Sanctuary Zone where Sonic boards the Death Egg and completely destroys it, before retrieving the Emerald.