It starts with a cutscene of Dr. Robotnik creating a new weapon called the Destroy Sonic Machine. He takes it, and starts chasing Sonic around, and tries to destroy him. This fails miserably, but it does cause Dr. Robotnik to mutate into a monster. So, he makes a new ultimate plan! This time, he decides to step on Sonic. He calls it "sophisticated". Sonic calls it "pathetic". Fans call it "a boring shame". Sonic plays through four zones, then de-mutates him. The shame ends with Sonic running off to Tails and Knuckles.