The century of Twilight Sparkle's rule is known as the "Age of Friendship" - Equestria is suspended in a glorious fusion of magic and technology. The spiers of Central City reflect the holographic aurora, the dragon merchant ships shuttle through the clouds, and the deep sea kingdom joins the alliance through the sonic channel. But Princess Twilight knows very well: true peace lies not under the Crystal Throne, but in the fire of the heart that is passed down from generation to generation. When the ruins of the ancient empire rumbled to life deep in the earth's veins, and when the first continental plate fell into the abyss, all eyes turned to the guardians who had not yet learned to fly...
