Six months after Sonic's adventure on the Starfall Islands, Dr. Eggman prepares his brand new weapon to take over Equestria, while Opaline remains silent in the shadows with no sign on being ready to make her next move. However, as Tails begins to search the two villains in order to test himself out, Sonic hallucinates with a figure he thought was defeated, yet has shown up more than he'll like them to.