Out of curiosity, a young Twilight Sparkle decides she wants to learn more about the city of Salt Lick and thus sends a letter to a random pony in there.
RollsRoyce is a rather boring stallion with an intellectual disability, everyday is exactly the same, and he is perfectly fine with that. One day a young filly sends him a letter that flips his world upside down. However she may very well be the best thing for him, and a beautiful friendship flourishes, all due to three words. Dear Twilight Sparkle.