Doctor Whooves A.K.A. Time Turner A.K.A. Doctor has been in Equestria for a while. For once in his long long life he found a place that didn't resort to mindless wars and fighting and found peace. But he couldn't shake his paranoia that something might happen. Despite nothing from his own past coming to ruin Equestria other realities might. Teaming up with Derpy Hooves, the Doctor sets out to fix the alternate timelines so that they don't influence his Equestria.

Twilight and the rest of her friends get summoned to a world where music is magic instead of "friend". The king of the world or as it is called there "Master Conductor" saw that they restored harmony to their world and after several disturbances to his own world that he couldn't solve alone he knew he needed help. However he had not intended to summon all of them only Twilight.