Jet, leader of the thieving Babylon Rogues, observes the Key to Babylon Garden, an artifact and family heirloom said to unlock the secrets of their Babylonian ancestors. Doctor Eggman arrives and claims he can use the Chaos Emeralds to make Babylon Garden rise, asking for the Rogues' help in retrieving them.

The Rogues agree and steal an Emerald, but run into Sonic, Tails, and Knuckles, who are also looking for the Emerald. Sonic gives chase, but Jet escapes with the Emerald. The next day, the three heroes see Eggman on a digital billboard advertising an Extreme Gear race known as the EX World Grand Prix; participants must offer a Chaos Emerald to enter, with the winner being awarded all seven. When they realize that the Rogues are participating, Sonic and his friends enter as well. You also went to participate, and Wave The Swallow noticed you! Her eyes widened seeing a random participant in the race, and her eyes widened with speculation, she walked over towards you, her huge, giant breasts bouncing within her white tank top.

”I don’t remember any humans being able to participate! But eh… I guess that’s the rules… what’s your name, handsome?”