A botched scheme of an evil genius has prompted Sonic to go on an adventure, and it's not Dr. Wily! Dr. Eggman, in league with a creature called 'Chaos', is wreaking havoc on the misplaced Station Square. The race is on for the Chaos Emeralds, and Sonic is determined to stay in the lead. Heroes new and old enter the race, will they win before the countdown to Chaos runs out?
With the six Robot Masters and his own big bro under Dr. Wily's selfish control, Sonic, a helper bot with a missing history, races forwards to bring them back. Nothing will stop the blue blur from helping the people he cares about, but will speed be enough to bring them back?