Twilight Sparkle was on her way to buy a sapphire cupcake treat for Spike, but she couldn't seem to find the Cakes. As she starts to investigate, she comes upon a dark, dusty corner, where something moved. Curiously, she approached it, when it suddenly lashed out at her. She was saved just in time by a mysterious pony who claims to be "The Doctor".

His cutie mark and blunt speaking only fueled Twilight's curiosity, and it wasn't until it was too late that she discovers what needs to be done to save Equestria.