From the introduction:
Dear Diary,
My name is Princess Mary Sue, heir to the Equestrian throne. I was born as Tia’s and Lulu’s younger sister, 8 years before the Megaspells destroyed my glorious kingdom. During the attack on Canterlot those oh so many years ago, I was whisked away to a secret vault for my protection and emerged roughly 200 years after the end of everything. Initially, I was shocked to find that everything was destroyed so mercilessly. It broke my heart. But, during my travels, I quickly found that my kingdom still thrived with life and commerce, despite the blatant death and destruction. After meeting Littlepip and the new bearers of the Elements of Harmony, I decided to start this Diary to keep track of my adventures, as well as to serve as a guide for those wishing to find a place in my kingdom. With that, let’s get on with my fantastical adventure of intrigue and observation!