The people on Mobius often wonder if there's something hidden in the skies, since shadows are sometimes cast when the sunlight strikes the clouds in a certain way. Such talk has given rise to rumours of a Floating Island. However, these tales are true as the island is protected by Knuckles, the last echidna. The camera soon reaches its destination, as a trapped Doctor Robotnik warns Knuckles that the evil Sonic the Hedgehog is coming...