You kill yourself and are sent to Equestria as one of 6 things then adventure from there.

The story of Discord the last god and a bunch of other people and creature stories.

A brony becomes a pack leader and is send into Equestria shortly before the a Dog and a pony show.

A foals journey to discover where it belongs after he is chased away from everything he knows.

A human with a lot of training in the use of weapons is summoned and bound to serve Nightmare Moon as a familiar. Will he ever be free or would he be nothing more then a servant until the day he dies?