It's been a couple of years since Discord, Luna and Celestia teamed up to fight their boredom. Every month on the first Tuesday they take over Equestria but last month they went too far. In their efforts to win the flag Discord turned Princess Twilight into a quesadilla. Now Princess Twilight is bent on revenge and will win no matter what it takes.

Is it necessary to read The Switch? No, I think you could figure out what's happening. Would it make more sense to do so? Yes.