Sonic wird von der Regierung verhaftet. Angeblich soll er auf Prison Island eingedrungen sein und dort schwere Verwüstungen angerichtet haben. Sonic kann fliehen, aber er wird von den neuen Regierungsrobotern verfolgt.
After Shadow steals one of the Chaos Emeralds, Sonic is blamed for the crime and finds himself on the run from the law. As he does so, he runs into Shadow, and realizes why he's suddenly become a wanted criminal, because Sonic and Shadow look very much alike. As the two collide, Shadow reveals his ability to harness the power of the Chaos Emerald to use Chaos Control, which gives him an edge over Sonic.
Ricercato per rapina, Sonic elude la sorveglianza della GUN. Qualche giorno dopo un riccio nero ruba uno Smeraldo del Caos da un museo.
Un erizo negro misterioso similar al de Sonic roba un banco, robando el verde esmeralda del caos.