Come around and see the mixture of two stories. One were ponies start meeting changelings through the lenses of six ponies now, turned changelings, and another one of queens facing the changing of history through their eyes.
Twilight and her friends knew each other from the start. Becoming heroes was unexpected, but welcome. Now that the wedding of Shining Armor draws near though, it's time to meet up with an old friend, and execute their true plan.