You are Sonic. In another battle with Eggman, he unknowingly destroyed all the chaos emeralds, causing a distortion of reality.. You, who happen to be nearby, accidentally fall into another dimension.. in a parallel world where all the creatures that lived in Green Hill are anthropomorphic people.

You can hardly open your eyes. There is a clear blue sky in front of you. You feel the grass beneath you and rise up with a grunt. But instead of your friends, you see people rushing about their business..