Astral Sentinel is just a typical security guard. The job pays well, has decent hours, and it's basically glorified customer service. There was just one odd thing stamped on the job description. Never ask about Sub-Level Five, ever.
The spell trapping Nightmare Moon within the orbital satellite is tampered with, pushing her release past a thousand years into a time where alicorns are myth, technology has somewhat stagnated, and nobody knows who she is.
Have you ever woken up as a vegan cartoon pony? I have, and she won’t shut up about it. I’m stuck in her body as our minds swap control and our memories blur. I’m not sure I can survive the rest of the day, let alone until we fix it
Yesterday, she was a sweet, somewhat old-fashioned exchange student trying to find her place in a strange culture. Today, Centorea Shianus is a new world's greatest terror.
A young filly in present day Ponyville is cursed with nightmares of post-apocalyptic Equestria. She finds herself influencing the course of future history in ways that she cannot understand.