Twilight gets a letter from Cadance. It seems like a casual letter one would send to distant family until she gets the end, which asks her to bring her friends with her to the Crystal Empire. While the Elements of Harmony are aware of what's happening, the problems with Prince Serenade make themselves clear as he starts to spend time in Ponyville, renamed Hockholm after years of city development, supposedly needing a vacation after two years spent working on a scientific breakthrough.