The carnival arrives without warning. No announcements precede it, it is simply there, arriving with the bombastic overture of spells, contraptions, and performances, as intricate as they are spectacular.

It isn't long before ponyville- and it's heroines- become involved... and all too soon, things seem to look strange. A great number of patrons, none of which seem familiar even in Equestria... A sudden upheaval that could threaten not just the carnival, but anything beyond... And a power, something great and arcane and incredibly ancient, that sits at the center of it all...