UPDATE: I changed the name of the story, because I got new idea, which in my opinion fits better, so sorry all of you, who clicked on the story and got confused.
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World, now called Broken is filled with darkness and horrors, created, when Equestria was brutally poured on the Earth. Ponies and humans - who didn´t die during the Great Breaking - are living their lives scattered, with their wills broken and minds insane.
Magic of the pony world and primal evil of people conflicted and created fiends, hiding in shadows and waiting for any poor soul to come by. In this chaos are three friends, who didn´t lost their hope, each one with their own secondary goal. But they all wants the same thing. Renew the balance and seperate these two worlds. Is it possible? And how did this tragedy even happened?

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The story consists from two parts. What happened (the Great Breaking) and what happens next (three friends).
Also it is taking place between S3 and S4.

WARNING: The story mentions real-life places.