Sonic and Tails are about to take a holiday when Tails notices an advertisement for a “World Grand Prix”. While not initially interested, Sonic notices that Dr. Robotnik is also participating in the race, which persuades him to change his mind and enter the race. It is revealed that Robotnik has recently learned of the whereabouts of the rare and powerful Chaos Emeralds, with which he aspires to enslave the world, and the World Grand Prix is actually a trap used to distract Sonic. Knuckles and Amy overhear of Robotnik’s plan and decide to compete. Together, the four must balance both winning races and obtaining the Chaos Emeralds to keep them out of Robotnik’s reach.