QUEEN ALEENA of Mobius gives birth to triplets: SONIC, the world famous blue hedgehog; the green, punk haired MANIC, and the pink, fashion conscious SONIA. As a deadly fate is predicted for the young hedgehogs, Aleena separates the triplets to protect them. Meanwhile, the evil DR. ROBOTNIK has gained control of Mobius, and threatens the population with being "roboticized". SONIC, SONIA and MANIC search for their mother while being pursued by two of ROBOTNIK'S bounty hunters, SLEET and DINGO and an army of menacing SWATbots. SONIC, SONIA and MANIC form a rock band called SONIC UNDERGROUND and lead the rebellion against Robotnik. ARTIFACT In order to make a lot of money, Robotnik sells artifacts to the nobility of Mobius. But these artifacts are actually from more recent history; they are bombs, and they're about to go off!! BUG! The band finds a village that has been destroyed by its Freedom Fighter occupants. Why has this happened? It seems to be something to do with the Flybots all over the desert, as Manic finds out when he's injected with a mind-control toxin. SONIC TONIC Using the essence of a rare plant, Robotnik manages to make Sleet and Dingo fast-- maybe even faster than Sonic. The Sonic Underground manage to get hold of it, but can Sonia and Manic resist the temptation of taking the drug themselves and being as fast as Sonic? FRIEND OR FOE The band visit the Floating Island in search of their mother. There they meet Knuckles the Echidna, the island's guardian, who has been told by Sleet and Dingo that the Sonic Underground is after the Chaos Emerald.