Sonic and his freedom fighter team land on the mysterious Angel Island, floating in the sky to search for a greater magic that holds the balance of the world. They are intercepted by the guardian, Knuckles the Echidna who thinks they've come to steal the Master Emerald. Sonic duels with Knuckles while the real menace, Dr. Robotnik steals the Master Emerald to fuel his greatest creation, The Death Egg.