Pinkie Pie is surprised and excited when she sees Twilight Sparkle walking with her dog Spike between the events of Equestria Girls and Rainbow Rocks, but she finds that Twilight is confused and doesn't remember her or Canterlot High. Soon after the encounter, Twilight from the human world becomes suspicious of Canterlot High and begins investigating strange lights seen in the sky, rumored hypnosis attacks, and the appearance of a friend she had lost.