It has been an interesting time for Equestria of late. Changeling invasions, the return and purification of Nightmare Moon, Discord, the ascension of a new princess, and the threat of Tirek.

Now Celestia's daughter, Dusk Star, has returned from a trip to the Zebrican lands, and no sooner than she is back in Canterlot than a new guest appears in the castle, in a room locked behind princess-only magic. Just having one visitor to the world is one thing, just keep it quiet, impress on them they are trespassing and keep an eye for any sneaking return trip. Having two visitors come in the span of twenty-four hours and one of them breaks through that spell like it wasn't even there? Harmony or some other power must be at work, and it's up to Dusk Star, the princess of protection, to figure out what.

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Art courtesy of Diamond06MLP, commissioned for this story.