Sunset Shimmer, the Magus of Freeport, has taken plenty of jobs since her arrival in the city. Though she's picky about what work she'll do, especially when the job is offered by one of her least favorite ponies in the world, the large bag of gold that came with the latest request was enough to change her mind.

And that's how she finds herself attending a high-end auction, where one of the rarest and most dangerous tomes of magic in the known world is being sold off to the highest bidder. With some of the world's wealthiest scum and villains attending, who walks out with the book could have consequences far beyond the islands.