The day prophesied to be that of Sombra's return is nearing. The Cutie Map has sent Twilight and Rarity on a mission to Canterlot, and the two can't seem to find the problem. A mysterious force lurks in the background, trying to stop the purple alicorn. Time is quickly running out, and Rarity is the only one who can figure out what's happening and put a stop to it before it's too late,

Also, Celestia is a giant spider, but when you look at it that fact isn't really all that important in the scheme of things.