On the outside Moonshine looks like any normal stallion, but on the inside the case is extremely different. He has a problem called 'multiple personalities'. He shows up in Ponyville and quickly finds himself in the library. He doesn't know how he got there, but he meets somepony who has a particular interest in his situation.
Twilight Sparkle

His inner conflict flares brighter than it ever has before. One voice says to leave town. One voice says to stay and make friends with these group of friends. One voice says that he is dangerous and could hurt them. Another voice says that he should stay in town and study their 'split personality' problem.
But one says that they are all wrong. That he is always right. That he should have control…. that terror will reign.
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I have been reading a book labeled When Rabbit Howls, and I became inspired to write a story about a stallion with multiple personalities. I have absolutely no experience with split-personality disorder or anything of that nature. I only know what it is like to other people and information I have gathered from my book. Just a heads up.
Also, there will be P.O.V. moments in the story, mostly just for the different personalities.
{NOTE}Story is undergoing some major story changes to make the content more bearable. I'm not a very good writer yet, so I'm re-writing most of it. So don't expect a new chapter for a while.