After the events with the Star Sapphires, Knuckles went back to Angel Island where he was visited by an unexpected surprise: another echidna named Julie-Su! She came from the Lost Tribe of Echidnas in the hidden caves of Chaos, a refuge for Echidnas. But Julie-Su needs Knuckles' help because a powerful enemy was attacking them and has sworn its life to wipe out the Echidnas! Knuckles believed his entire life that he was the last of his kind, but now he gets the chance to save them all! He'll have his friends Mighty, Ray, and Amy's cousin Rob O'Hedge (who volunteered) to save the Lost Tribe and defeat the all-powerful self-proclaimed demigod of the Echidnas known as . . . Enerjak.
