The chaotic nature of the chaos emeralds had been strong enough to reawakened a past evil in Equestria. Sonic had fallen from the sky only to wake up in a strange library talking to a purple dragon. However, Sonic was not the only one to cross into Equestria. Eggman wakes up in a strange throne room in the middle of a forest hearing voices of a regal and sinister voice calling out to him. And Discord laughs manically as he uncovers a large gem filled with chaotic energy. Can Sonic, Twilight, and the rest of the wielders of the Elements of Harmony stop Discord from ruling all of Equestria?