A new alicorn has arrived in Ponyville. She seems to have many extrodinary but unrealistic abilities,
such as being able to change the force of gravity and bending fire.
Yet she has no cutie mark.
Twilight Sparkle has a very hard time believing that this pony is real.
The strange, talented pony, named Turquoise, for her fur color, seems like she's not a real pony, and gradually, Turquoise begins to be suspected by the citizens of Ponyville.
Twilight Sparkle eventually decides that Turquoise does not only have pony blood in her.

She may also be part of another species.

Midnight. It's the dead of night, when the sky was darkest and the moon shines eerily in the sky. When the lights go dark and the candles burn out, when your too scared to get out of bed and turn on the light. The breathing under your bed and the creak as the closet door shifts ever so slightly, the thumps outside your door and the creaking of floorboards. That shadow moving across the room and the gleam of sharp teeth in the darkness, that sensation that you're not safe and the feeling of malicious eyes boring into the back of your skull.

Twilight Sparkle wasn't alone.

A/N: Rated Teen for graphicness of some scenes. If you don't like horror and blood, don't read this. You've been warned.