It was some 20 years since Sonic the Hedgehog had emerged victor of the battle for Green Hill Zone, defeating Robotnik and freeing countless innocent lives along the way. The very people who he had saved along the way moved into the cities and green spaces in their droves, working, populating, consuming and whatever else city folk did. Sonic was held-up as a hero in an opening ceremony which saw the Green Hill Zone undergo a "revamp" by Mayor Chestnut Jr. It was to be given new life by having housing built upon it, commercial zones, offices and a number of other populous generating ventures. Sonic now worked as a private investigator, still pining away at the injustices that continued to plague the world he lived in. What ate him up more than anything was the "new world" he helped to create was becoming just as crime-ridden as it was when he was an active rebel against Robotnik's regime… and the very individuals he had saved were contributing to destroying the land he fought all of his life to save.